CVE-2026-102869: .NET and Visual Studio Elevation of Privilege Vulnerability

Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available

What, why and how

Access of resource using incompatible type ('type confusion') in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

What

Access of resource using incompatible type ('type confusion') in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Why

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may gain additional privileges.

What

Access of resource using incompatible type ('type confusion') in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Why

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may gain additional privileges.

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 → Access of Resource Using Incompatible Type ('Type Confusion') → gain additional privileges
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: Required interaction required
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-843 ↗
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion'). The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
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:R/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.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.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: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

NetworkUnauthenticatedPrivilege escalationCWE-843

Official authority intelligence

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

ENISA EUVD · EUVD-2026-100376Official EUVD mapping

Access of resource using incompatible type ('type confusion') in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Official EUVD record ↗

BSI · German · WID-SEC-2026-3893Microsoft Entwicklerwerkzeuge: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft .NET Framework, Microsoft .NET, Microsoft ASP.NET, Microsoft Visual Studio 2022, Microsoft Visual Studio 2026, Microsoft Visual Studio Code, Microsoft SysInternals und Microsoft PowerShell ausnutzen, um seine Privilegien zu erhöhen, um Code auszuführen, um Informationen offenzulegen, um Sicherheitsmechanismen zu umgehen und um einen Denial of Service Zustand herbeizuführen.

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1313Avis du CERT-FR

hage Déclarer un incident Nous connaître A propos du CERT-FR RFC2350 Ecosystème des CERT/CSIRT Politique de partage des informations Publications Alertes de sécurité Rapports menaces et incidents Avis de sécurité Indicateurs de compromission Durcissement et recommandations Bulletins d'actualité Fiches réflexes Nos services Nous rejoindre Avis du CERT-FR Json Objet : Multiples vulnérabilités dans Microsoft .Net Gestion du document Référence CERTFR-2026-AVI-1313 Titre Multiples vulnérabilités dans Microsoft .Net Date de la première version 14 octobre 2026 Date de la dernière version 14 octobre 2026 Source(s) Bulletin de sécurité Microsoft .Net CVE-2026-102869 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-105016 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-108398 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-58280 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-66822 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-69651 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-70007 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-70035 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-70161 du 13 octobre 2026 Bulletin de sécurité Microsoft .Net CVE-2026-70165 du 13 octobre 202

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1316Avis du CERT-FR

02238 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102851 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102859 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102860 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102861 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102862 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102863 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102864 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102865 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102866 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102869 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-102870 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-103572 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105013 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105016 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105713 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105719 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105720 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105727 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2026-105728 du 13 octobre 2026 Bulletin de sécurité Microsoft CVE-2

Official advisory ↗

CSIRT Italia · Italian · aggiornamenti-mensili-microsoft-25Aggiornamenti Mensili Microsoft

a - - CVE-2026-105005 : apre una nuova finestra - - CVE-2026-105004 : apre una nuova finestra - - CVE-2026-105003 : apre una nuova finestra - - CVE-2026-103577 : apre una nuova finestra - - CVE-2026-103575 : apre una nuova finestra - - CVE-2026-103572 : apre una nuova finestra - - CVE-2026-103569 : apre una nuova finestra - - CVE-2026-103568 : apre una nuova finestra - - CVE-2026-103565 : apre una nuova finestra - - CVE-2026-103558 : apre una nuova finestra - - CVE-2026-103555 : apre una nuova finestra - - CVE-2026-103554 : apre una nuova finestra - - CVE-2026-103553 : apre una nuova finestra - - CVE-2026-102870 : apre una nuova finestra - - CVE-2026-102869 : apre una nuova finestra - - CVE-2026-102866 : apre una nuova finestra - - CVE-2026-102863 : apre una nuova finestra - - CVE-2026-102862 : apre una nuova finestra - - CVE-2026-102861 : apre una nuova finestra - - CVE-2026-102860 : apre una nuova finestra - - CVE-2026-102858 : apre una nuova finestra - - CVE-2026-102857 : apre una nuova finestra - - CVE-2026-102856 : apre una nuova finestra - - CVE-2026-102855 : apre una nuova finestra - - CVE-2026-102850 : apre una nuova finestra - - CVE-2026-102849 : apre una nuova finestra - - CVE-2026-102238 : apre una nuova finestra - - CVE-2026-102235 : apre una nuova finestra - - CVE-2026-102234 : apr

Official advisory ↗

NCSC-NL · Dutch · NCSC-2026-0426Kwetsbaarheden verholpen in Microsoft Developer Tools

Een kwaadwillende kan aanvallen uitvoeren die kunnen leiden tot de categoriën schade zoals weergegeven in de onderstaande tabellen. .NET: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-58280 | 7.50 | Denial-of-Service | | CVE-2026-66822 | 5.90 | Toegang tot gevoelige gegevens | | CVE-2026-69651 | 7.50 | Denial-of-Service | | CVE-2026-70161 | 7.30 | Verkrijgen van verhoogde rechten | | CVE-2026-70165 | 6.70 | Verkrijgen van verhoogde rechten | | CVE-2026-70174 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-70190 | 7.30 | Verkrijgen van verhoogde rechten | | CVE-2026-70197 | 8.10 | Uitvoeren van willekeurige code | | CVE-2026-83520 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-84008 | 7.50 | Denial-of-Service | | CVE-2026-87697 | 8.80 | Uitvoeren van willekeurige code, | | CVE-2026-96224 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-96225 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-96229 | 6.50 | Toegang tot gevoelige gegevens | | CVE-2026-96231 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-96232 | 7.50 | Toegang tot gevoelige gegevens | | CVE-2026-96234 | 5.30 | Toegang tot gevoelige gegevens | | CVE-2026-96235 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-96237 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-96238 | 6.50 | Omzeilen van beveiligingsmaatregel | | CVE-2026-96957 | 8.80 | Omzeilen van beveiligingsmaatregel | | CVE-2026-96958 | 7.50 | Denial-of-Service | | CVE-2026-96959 | 7.50 | Denial-of-Service | | CVE-2026-96960 | 7.50 | Denial-of-Service | |------------------|------|-------------------------------------| Visual Studio Code: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-102229 | 6.80 | Toegang tot gevoelige gegevens | | CVE-2026-102230 | 7.40 | Toegang tot gevoelige gegevens | | CVE-2026-102231 | 7.70 | Omzeilen van beveiligingsmaatregel | | CVE-2026-102232 | 7.00 | Omzeilen van beveiligingsmaatregel | | CVE-2026-102233 | 7.80 | Omzeilen van beveiligingsmaatregel | | CVE-2026-102234 | 7.40 | Omzeilen van beveiligingsmaatregel | | CVE-2026-102235 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-102238 | 9.60 | Uitvoeren van willekeurige code | | CVE-2026-102851 | 6.10 | Omzeilen van beveiligingsmaatregel | | CVE-2026-69370 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-70098 | 8.80 | Uitvoeren van willekeurige code | |------------------|------|-------------------------------------| ASP.NET Core: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-102870 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-70159 | 7.50 | Denial-of-Service | | CVE-2026-70175 | 8.10 | Verkrijgen van verhoogde rechten | | CVE-2026-70179 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-70181 | 7.50 | Denial-of-Service | | CVE-2026-70183 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-70186 | 7.50 | Denial-of-Service | | CVE-2026-70188 | 9.10 | Omzeilen van beveiligingsmaatregel | | CVE-2026-70196 | 5.90 | Denial-of-Service | | CVE-2026-88092 | 9.40 | | | CVE-2026-96230 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-96233 | 7.50 | Denial-of-Service | | CVE-2026-96236 | 7.50 | Denial-of-Service | |------------------|------|-------------------------------------| Visual Studio Tools for Applications and SQL Server Management Studio: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-103572 | 8.80 | Uitvoeren van willekeurige code | |------------------|------|-------------------------------------| Windows AppX Deployment Extensions: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-69945 | 8.80 | Verkrijgen van verhoogde rechten | |------------------|------|-------------------------------------| .NET Framework: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-108398 | 8.80 | Omzeilen van beveiligingsmaatregel | | CVE-2026-70007 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-70035 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-70194 | 6.50 | Omzeilen van beveiligingsmaatregel | | CVE-2026-85363 | 8.80 | Verkrijgen van verhoogde rechten | |------------------|------|-------------------------------------| Windows AppX Deployment Service: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-69905 | 5.50 | | | CVE-2026-69914 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-69969 | 4.70 | Toegang tot gevoelige gegevens | | CVE-2026-69979 | 5.50 | Omzeilen van beveiligingsmaatregel | | CVE-2026-85849 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-85934 | 7.00 | Verkrijgen van verhoogde rechten | |------------------|------|-------------------------------------| .NET and Visual Studio: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-------------------------------------| | CVE-2026-102869 | 8.80 | Verkrijgen van verhoogde rechten, | |------------------|------|-------------------------------------|

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: Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2: 3.0.0.0 < 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
Microsoft .NET Framework 3.5 AND 4.7.2: 4.7.0 < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
Microsoft .NET Framework 3.5 AND 4.8: 4.8.0 < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
Microsoft .NET Framework 3.5 AND 4.8.1: 4.8.1 < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: 4.7.0 < 4.7.4150.0
Microsoft .NET Framework 4.8: 4.8.0 < 4.8.4811.0
Microsoft .NET Framework 4.8.1: 4.8.0.0 < 4.8.9363.0
Microsoft Visual Studio 2022 version 17.14: 17.14.0 < 17.14.42
Microsoft Visual Studio 2026 version 18.10: 18.10.0 < 18.10.4
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 articles12 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.

October 13, 2026—KB5126868 (OS Build 14393.9612) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026—KB5126868 (OS Build 14393.9612) 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 LTSB 2016 and Windows 10 IoT Enterprise 2016 LTSB ends on October 13, 2026. Free support for Windows Server 2016 ends soon. To lea
October 13, 2026-KB5127666 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10, version 1809 and Windows Server 2019 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127666 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10, version 1809 and Windows Server 2019 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.7.2 The October 13, 2026 update for Windows 10, version 1809 and Windows Server 2019 includes secu
October 13, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB5127667) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB5127667) Applies To .NET Note Applies to: Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Important The installation of this Ext
October 13, 2026-KB5127684 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127684 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 4.8 The October 13, 2026 update for Windows 10, version 1607 and Windows Server 2016 includes security and cumulative
October 13, 2026-KB5127685 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127685 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows 10, version 1809 and Windows Server 2019 includes security
October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5127686) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5127686) Applies To .NET Note Applies to: Microsoft .NET Framework 4.8 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 W
October 13, 2026-KB5127687 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127687 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows Server 2022 includes security and cumulative reliability improvements in .NET Framework
October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5127688) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5127688) Applies To .NET Note Applies to: Microsoft .NET Framework 4.8 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 runnin
October 13, 2026-KB5127689 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127689 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows 10 Version 21H2 and Windows 10 Version 22H2 include
October 13, 2026-KB5127690 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2, Windows 11, version 25H2 and Microsoft server operating system 24H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127690 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2, Windows 11, version 25H2 and Microsoft server operating system 24H2 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows 11, version 2
October 13, 2026-KB5127691 Cumulative Update for .NET Framework 4.8.1 for Windows 11, version 26H1 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127691 Cumulative Update for .NET Framework 4.8.1 for Windows 11, version 26H1 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 4.8.1 The October 13, 2026 update for Windows 11, version 26H1 includes security and cumulative reliability improvements in .NET Framework 4.8.1
October 13, 2026-KB5127692 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 23H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Oct 2026October 13, 2026-KB5127692 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 23H2 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows 11 23H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and

Evidence and provenance

Published 13 Oct 2026 · Last source change 14 Oct 2026, 18:00 UTC · CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')

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 2026-10-14

European sourceENISA EUVD · EUVD-2026-100376

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceOther authority

NVD statusNVD awaiting enrichment

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

Material change intelligence

What changed after publication

View recent updates ↗

14 Oct 2026, 18:00 UTC
Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-25.
Before
remediation: acn.gov.it/aggiornamenti-mensili-microsoft-25
After
no authoritative guidance recorded
CNA ↗
14 Oct 2026, 18:00 UTC
Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
Before
Mitigation available
After
Awaiting fix
CNA ↗
14 Oct 2026, 16:31 UTC
Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-25.
Before
remediation: acn.gov.it/aggiornamenti-mensili-microsoft-25
After
no authoritative guidance recorded
CNA ↗
14 Oct 2026, 16:31 UTC
Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
Before
Mitigation available
After
Awaiting fix
CNA ↗
14 Oct 2026, 08:49 UTC
Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
Before
Awaiting fix
After
Mitigation available
CSIRT Italia ↗
14 Oct 2026, 03:43 UTC
ENISA EUVD mappingEUVD-2026-100376 was added to the official ENISA EUVD mapping for this CVE.
Before
not recorded
After
{"euvdId":"EUVD-2026-100376"}
ENISA EUVD ↗
13 Oct 2026, 19:25 UTC
Catalogue recordCVE added to the BlackTree catalogue.
CNA ↗
13 Oct 2026, 19:23 UTC
CVSS scoreCVSS vector changed while the displayed base score remained 8.8.
Before
8.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
After
8.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
CNA ↗

2026-10-13CVE published

2026-10-14Remediation guidance recorded

ENISA EUVD · EUVD-2026-100376↗CSIRT Italia remediation guidance↗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.

.NET and Visual Studio Elevation of Privilege 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-2026-100376

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication