CVE-2026-73009: Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

Recommended actionWithin 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available

What, why and how

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

What

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Use After Free → execute code or commands in the affected security context
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-416 ↗
CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.

NetworkUnauthenticatedRemote code executionCWE-416

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-73773Official EUVD mapping

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

Official EUVD record ↗

BSI · German · WID-SEC-2026-3243Microsoft Windows: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows Server, Microsoft Windows 10 und Microsoft Windows 11 ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service herbeizuführen, um Informationen offenzulegen und um beliebigen Code auszuführen.

Official advisory ↗

INCIBE-CERT · Spanish · boletin-de-seguridad-de-microsoft-septiembre-de-2026Boletín de seguridad de Microsoft: septiembre de 2026

ad de Ejecución Remota de Código en Windows DHCP Server CVE-2026-69854: vulnerabilidad de Elevación de Privilegios en Spring Cloud Azure CVE-2026-69910: vulnerabilidad de Ejecución Remota de Código en Windows Hyper-V CVE-2026-70296: vulnerabilidad de Ejecución Remota de Código en Windows Imaging Component CVE-2026-70352: vulnerabilidad de Elevación de Privilegios en Azure AI Language CVE-2026-72979: vulnerabilidad de Ejecución Remota de Código en Windows DHCP Server CVE-2026-72982: vulnerabilidad de Ejecución Remota de Código en Windows Netlogon CVE-2026-72983: vulnerabilidad de Ejecución Remota de Código en Internet Connection Sharing (ICS) CVE-2026-73009: vulnerabilidad de Ejecución Remota de Código en Windows Secure Socket Tunneling Protocol (SSTP) CVE-2026-73010: vulnerabilidad de Ejecución Remota de Código en Microsoft Failover Cluster CVE-2026-73025: vulnerabilidad de Omisión de Característica de Seguridad en Windows iSCSI CVE-2026-77493: vulnerabilidad de Ejecución Remota de Código en Windows Graphics Component CVE-2026-78445: vulnerabilidad de Ejecución Remota de Código en Windows Services for NFS ONCRPC XDR Driver CVE-2026-78509: vulnerabilidad de Ejecución Remota de Código en Microsoft Office Outlook CVE-2026-78510: vulnerabilidad de Ejecución Remota de Código en Microsoft Word CVE-2

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1147Multiples vulnérabilités dans Microsoft Windows

embre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73001 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73002 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73003 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73004 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73005 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73006 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73007 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73008 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73009 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73010 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73011 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73012 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73013 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73014 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73015 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73016 du 08 septembre 2026 Bulletin de sécurité Microsoft Windows CVE-2026-73017 du 08 septembre 2026 Bulletin de sécurité Microso

Official advisory ↗

CSIRT Italia · Italian · aggiornamenti-mensili-microsoft-24Aggiornamenti Mensili Microsoft

nuova finestra - - CVE-2026-69593 : apre una nuova finestra - - CVE-2026-69594 : apre una nuova finestra - - CVE-2026-69588 : apre una nuova finestra - - CVE-2026-69589 : apre una nuova finestra - - CVE-2026-69586 : apre una nuova finestra - - CVE-2026-69587 : apre una nuova finestra - - CVE-2026-73002 : apre una nuova finestra - - CVE-2026-73003 : apre una nuova finestra - - CVE-2026-73000 : apre una nuova finestra - - CVE-2026-73001 : apre una nuova finestra - - CVE-2026-72954 : apre una nuova finestra - - CVE-2026-72953 : apre una nuova finestra - - CVE-2026-72956 : apre una nuova finestra - - CVE-2026-73008 : apre una nuova finestra - - CVE-2026-73009 : apre una nuova finestra - - CVE-2026-72950 : apre una nuova finestra - - CVE-2026-73006 : apre una nuova finestra - - CVE-2026-73007 : apre una nuova finestra - - CVE-2026-72952 : apre una nuova finestra - - CVE-2026-73004 : apre una nuova finestra - - CVE-2026-73005 : apre una nuova finestra - - CVE-2026-72958 : apre una nuova finestra - - CVE-2026-72957 : apre una nuova finestra - - CVE-2026-72959 : apre una nuova finestra - - CVE-2026-69896 : apre una nuova finestra - - CVE-2026-73013 : apre una nuova finestra - - CVE-2026-73014 : apre una nuova finestra - - CVE-2026-73011 : apre una nuova finestra - - CVE-2026-73012 : apre una nuova fi

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-035499マイクロソフトのMicrosoft Windows 10 1607等の複数製品における解放済みメモリの使用に関する脆弱性

Windowsのセキュアソケットトンネリングプロトコル（SSTP）における解放後使用（Use after free）の脆弱性により、認可されていない攻撃者がネットワーク経由でコードを実行できる可能性があります。

Official advisory ↗

KISA KrCERT/CC · Korean · KNVD-6946MS 9월 보안 위협에 따른 정기 보안 업데이트 권고

Official advisory ↗

NCSC-NL · Dutch · NCSC-2026-0353Kwetsbaarheden verholpen in Microsoft Windows

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de categorieën schade, zoals genoemd in onderstaande tabel. Microsoft heeft voor Windows 666 kwetsbaarheden verholpen. De 32 ernstigste kwetsbaarheden bevinden zich in meerdere Windows componenten en hebben een CVSS score van 9.0 en hoger toegewezen gekregen. Kwaadwillenden met toegang tot deze componenten kunnen zonder voorafgaande authenticatie mogelijk code uitvoeren of zich toegang verschaffen tot het kwetsbare systeem. Deze kwetsbaarheden zijn in onderstaande tabel weergegeven. De overige 634 kwetsbaarheden variëren in ernst van middelmatig tot hoog en kritiek. Raapleeg het MSRC-portaal voor aanvullende informatie. ==**UPDATE**== De kwetsbaarheid met kenmerk CVE-2026-81963 heeft een CVSS-score van 7,8. Het betreft een privilege-escalatiekwetsbaarheid in de Windows Update Stack. Een geauthenticeerde kwaadwillende kan deze kwetsbaarheid lokaal misbruiken om zijn rechten te verhogen en SYSTEM-rechten te verkrijgen. Microsoft meldt dat de kwetsbaarheid actief wordt misbruikt. Er zijn geen details bekend over de wijze waarop de kwetsbaarheid bij aanvallen wordt misbruikt. De kwetsbaarheid met kenmerk CVE-2026-85880 heeft een CVSS-score van 7,8. Het betreft een privilege-escalatiekwetsbaarheid in Windows Advanced Local Procedure Call (ALPC). Een geauthenticeerde kwaadwillende kan deze kwetsbaarheid lokaal misbruiken om zijn rechten te verhogen en SYSTEM-rechten te verkrijgen. Microsoft meldt dat de kwetsbaarheid actief wordt misbruikt. Er zijn geen details bekend over de wijze waarop de kwetsbaarheid bij aanvallen wordt misbruikt. ==**EINDE UPDATE**== ``` |----------------|------|---------------------------|-------------------------------------| | CVE-ID | CVSS | Component | Impact | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-73025 | 9,80 | iSCSI | Omzeilen van beveiligingsmaatregel | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69276 | 9,80 | UxTheme Library | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-70296 | 9,80 | Imaging | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69730 | 9,80 | DNS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| |CVE-2026-69824 | 9,80 | XPS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| |CVE-2026-69590 | 9,80 | RRAS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69463 | 9,80 | NTFS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69669 | 9,80 | NTFS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69845 | 9,80 | DHCP Server | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-72979 | 9,80 | DHCP Server | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69595 | 9,80 | NFS ONCRPC | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-78445 | 9,80 | NFS ONCRPC | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69829 | 9,80 | SHELL | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-72983 | 9,80 | ICS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69579 | 9,80 | Message Queuing | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69496 | 9,80 | Compressed Folder | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69774 | 9,00 | Hyper-V | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69910 | 9,80 | Hyper-V | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-72982 | 9,80 | Netlogon | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69769 | 9,80 | HTTP Print Provider | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69431 | 9,80 | Telnet Client | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69639 | 9,80 | Libarchive | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69819 | 9,80 | RPC Runtime | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69493 | 9,80 | Event Logging Service | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69434 | 9,80 | URL Moniker | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69715 | 9,80 | Direct Show | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-73009 | 9,80 | SSTP | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-68839 | 9,80 | USB Mass Storage Class | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-68839 | 9,80 | Remote Desktop Services | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69525 | 9,80 | USB Mass Storage Class | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-73010 | 9,80 | Failover Cluster | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-69768 | 9,80 | RNDIS | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-77493 | 9,80 | Office Outlook | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| ```

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: Windows Server 2019: 10.0.17763.0 < 10.0.17763.9245
Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7725
Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.23398
Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.26349
Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.33438
Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9445
Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.9512
Windows Server 2022: 10.0.20348.0 < 10.0.20348.5622
Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.23398
Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7725
Windows Server 2025: 10.0.26100.0 < 10.0.26100.33438
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9512
Windows Server 2012: 6.2.9200.0 < 6.2.9200.26349
Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9445
Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7582
Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.9245
Windows Server 2016: 10.0.14393.0 < 10.0.14393.9512
Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9245
Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.2954
Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Official vendor articles10 stored documents

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

September 8, 2026—KB5122880 (OS Build 22631.7582) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 24 Oct 2026September 8, 2026—KB5122880 (OS Build 22631.7582) Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 (KB5122880), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release
September 8, 2026—KB5122871 (OS Build 26100.33438) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 23 Oct 2026September 8, 2026—KB5122871 (OS Build 26100.33438) Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 (KB5122871), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release health d
September 8, 2026—KB5122876 (OS Build 17763.9245) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 23 Oct 2026September 8, 2026—KB5122876 (OS Build 17763.9245) Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Summary This article lists the security issues and quality improvements included in this cumulative security update. Windows Server 2019 Windows 10, version 1809 Applies to: Windows Server 2019 This security update
September 8, 2026—KB5122882 (OS Build 20348.5622) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 23 Oct 2026September 8, 2026—KB5122882 (OS Build 20348.5622) Applies To Windows Server 2022 This cumulative update for Windows Server 2022 (KB5122882), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release health dashboard for th
September 8, 2026—KB5122878 (OS Builds 19045.7725 and 19044.7725) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 22 Oct 2026September 8, 2026—KB5122878 (OS Builds 19045.7725 and 19044.7725) Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Important Free support for Windows 10 Enterprise LTSC 2021 will end soon. For information about the availability of an Extended Security Update (ESU), see the
September 8, 2026—KB5123065 (Monthly Rollup) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 22 Oct 2026September 8, 2026—KB5123065 (Monthly Rollup) Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update (ESU) might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpo
September 8, 2026—KB5123066 (Monthly Rollup) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 22 Oct 2026September 8, 2026—KB5123066 (Monthly Rollup) Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update (ESU) might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of
September 8, 2026—KB5123099 (OS Build 14393.9512) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 22 Oct 2026September 8, 2026—KB5123099 (OS Build 14393.9512) Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Important Free support for Windows 10 Enterprise 2016 LTSB and Windows Server 2016 will soon end. For information about the availability of Extended Security Updates (ESUs), see
September 8, 2026—KB5124008 (OS Builds 26200.9445 and 26100.9445) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 22 Oct 2026September 8, 2026—KB5124008 (OS Builds 26200.9445 and 26100.9445) Applies To Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions Want a quick overview?: Watch the Windows 11 release note video for this update. Announcements and messages This section provides key notifications related to this r
September 8, 2026-KB5124012 (OS Build 28000.2954) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 22 Oct 2026September 8, 2026—KB5124012 (OS Build 28000.2954) Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 (KB5124012) includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the Windows release h

Evidence and provenance

Published 8 Sept 2026 · Last source change 14 Oct 2026, 23:13 UTC · CWE-416 · Use After Free

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-09-09

European sourceENISA EUVD · EUVD-2026-73773

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceOther authority

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

24 Sep 2026, 22:27 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9512; Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9245; Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7725; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7725; Windows 11 version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9445; Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9445; Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.2954; Windows Server 2012: 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.23397; Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.23397; Windows Server 2016: 10.0.14393.0 < 10.0.14393.9512; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.9512; Windows Server 2019: 10.0.17763.0 < 10.0.17763.9245; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.9245; Windows Server 2022: 10.0.20348.0 < 10.0.20348.5622; Windows Server 2025: 10.0.26100.0 < 10.0.26100.33438; Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.33438 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
After
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9512; Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9245; Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7725; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7725; Windows 11 version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9445; Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9445; Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.2954; Windows Server 2012: 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.23398; Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.23398; Windows Server 2016: 10.0.14393.0 < 10.0.14393.9512; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.9512; Windows Server 2019: 10.0.17763.0 < 10.0.17763.9245; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.9245; Windows Server 2022: 10.0.20348.0 < 10.0.20348.5622; Windows Server 2025: 10.0.26100.0 < 10.0.26100.33438; Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.33438 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
CNA ↗
17 Sep 2026, 19:57 UTC
Vendor guidanceAuthoritative vendor guidance changed: added patch: msrc.microsoft.com/CVE-2026-73009; added remediation: msrc.microsoft.com/CVE-2026-73009.
Before
no authoritative guidance recorded
After
patch: msrc.microsoft.com/CVE-2026-73009 · remediation: msrc.microsoft.com/CVE-2026-73009
secure@microsoft.com ↗
17 Sep 2026, 19:57 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9512; Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9245; Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7725; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7725; Windows 11 version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9445; Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9445; Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.2954; Windows Server 2012: 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.23397; Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.23397; Windows Server 2016: 10.0.14393.0 < 10.0.14393.9512; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.9512; Windows Server 2019: 10.0.17763.0 < 10.0.17763.9245; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.9245; Windows Server 2022: 10.0.20348.0 < 10.0.20348.5622; Windows Server 2025: 10.0.26100.0 < 10.0.26100.33438; Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.33438 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9512; Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9245; Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7725; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7725; Windows 11 version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9445; Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9445; Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.2954; Windows Server 2012: 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.23397; Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.23397; Windows Server 2016: 10.0.14393.0 < 10.0.14393.9512; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.9512; Windows Server 2019: 10.0.17763.0 < 10.0.17763.9245; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.9245; Windows Server 2022: 10.0.20348.0 < 10.0.20348.5622; Windows Server 2025: 10.0.26100.0 < 10.0.26100.33438; Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.33438 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
CNA ↗
17 Sep 2026, 19:57 UTC
Remediation statusRemediation status changed from Awaiting fix to Patch available.
Before
Awaiting fix
After
Patch available
secure@microsoft.com ↗
11 Sep 2026, 22:16 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
10.0.14393.0 < 10.0.14393.9512; 10.0.17763.0 < 10.0.17763.9245; 10.0.19044.0 < 10.0.19044.7725; 10.0.19045.0 < 10.0.19045.7725; 10.0.22631.0 < 10.0.22631.7582; 10.0.26100.0 < 10.0.26100.9445; 10.0.26200.0 < 10.0.26200.9445 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9512; Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9245; Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7725; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7725; Windows 11 version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7582; Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9445; Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9445; Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.2954; Windows Server 2012: 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.26349; Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.23397; Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.23397; Windows Server 2016: 10.0.14393.0 < 10.0.14393.9512; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.9512; Windows Server 2019: 10.0.17763.0 < 10.0.17763.9245; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.9245; Windows Server 2022: 10.0.20348.0 < 10.0.20348.5622; Windows Server 2025: 10.0.26100.0 < 10.0.26100.33438; Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.33438 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
CNA ↗
9 Sep 2026, 15:04 UTC
ENISA EUVD mappingEUVD-2026-73773 was added to the official ENISA EUVD mapping for this CVE.
Before
not recorded
After
{"euvdId":"EUVD-2026-73773"}
ENISA EUVD ↗
8 Sep 2026, 23:49 UTC
BlackTree coverageBlackTree article coverage changed from no BlackTree article to 1 BlackTree article.
Before
no BlackTree article
After
1 BlackTree article
BlackTree editorial ↗
8 Sep 2026, 17:18 UTC
Catalogue recordCVE added to the BlackTree catalogue.
CNA ↗

2026-09-08CVE published

2026-10-14Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-73773↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

Published severity in operational context

Evidence used

Compensating controls

Verification

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2026-73773

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication