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Full vulnerability report · 2025
CVE-2025-33071High confidence

Windows KDC Proxy Service (KPSSVC) Remote Code Execution Vulnerability

Microsoft · Windows Server 2012

8.1HighCVSS 3.1
Recommended action
Within 7 days

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

Fix not verified
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-17772

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

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

Fix not verified
01

What, why and how

Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.

What

Use after free in Windows KDC Proxy Service (KPSSVC) 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 KDC Proxy Service (KPSSVC) 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.

02

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
High: exploitation depends on specific conditions
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:H/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.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2025-1277Microsoft Windows: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows und Microsoft Windows Server ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um beliebigen Programmcode auszuführen, um Informationen offenzulegen, um Sicherheitsvorkehrungen zu umgehen, und um falsche Informationen darzustellen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0499Multiples vulnérabilités dans Microsoft Windows

é Microsoft Windows CVE-2025-33062 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33063 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33064 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33065 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33066 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33067 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33068 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33069 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33070 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33071 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33073 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-33075 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-47160 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-47955 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-47956 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-47962 du 10 juin 2025 Bulletin de sécurité Microsoft Windows CVE-2025-47969 du 10 juin 2025 Une gestion de version détaillée se trouve à la fin de ce document. Risques Atteinte à la confidentialité des données Contournement de la polit

Official advisory
NCSC-NL · Dutch · NCSC-2025-0188Kwetsbaarheden verholpen in Microsoft Windows

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade: - Denial of Service (DoS) - Omzeilen van een beveiligingsmaatregel - Uitvoeren van willekeurige code (Gebruikersrechten) - Uitvoeren van willekeurige code (Root/Adminrechten) - Toegang tot gevoelige gegevens - Verkrijgen van verhoogde rechten - Spoofing ``` Windows Recovery Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32721 | 7.30 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Security App: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-47956 | 5.50 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| App Control for Business (WDAC): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33069 | 5.10 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Remote Desktop Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32710 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Storage Management Provider: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32719 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-32720 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33058 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33059 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33060 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33061 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33062 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33063 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33065 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-24068 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-24069 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-24065 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-33055 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Local Security Authority Subsystem Service (LSASS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32724 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows KDC Proxy Service (KPSSVC): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33071 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Remote Access Connection Manager: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-47955 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Remote Desktop Client: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32715 | 6.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Storage Port Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32722 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Installer: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32714 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2025-33075 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Hello: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-47969 | 4.40 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| WebDAV: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33053 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Standards-Based Storage Management Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33068 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Cryptographic Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-29828 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Win32K - GRFX: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32712 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Routing and Remote Access Service (RRAS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33064 | 8.80 | Uitvoeren van willekeurige code | | CVE-2025-33066 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Kernel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33067 | 8.40 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Secure Boot: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-3052 | 6.70 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Media: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32716 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Netlogon: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33070 | 8.10 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows SMB: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32718 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2025-33073 | 8.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Common Log File System Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32713 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Local Security Authority (LSA): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33057 | 6.50 | Denial-of-Service | |----------------|------|-------------------------------------| Microsoft Local Security Authority Server (lsasrv): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33056 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows DHCP Server: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-32725 | 7.50 | Denial-of-Service | | CVE-2025-33050 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows DWM Core Library: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-33052 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Shell: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-47160 | 5.40 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| ```

Official advisory
03

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.
Fix not verified
Affected
6.2.9200.0 < 6.2.9200.25522; 6.3.9600.0 < 6.3.9600.22620; 10.0.14393.0 < 10.0.14393.8148; 10.0.17763.0 < 10.0.17763.7434
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
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.
04

Evidence and provenance

Published 10 Jun 2025 · Last source change 26 Feb 2026, 17:50 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 2026-08-14
European sourceENISA EUVD · EUVD-2025-17772
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 →
  1. BlackTree coverageBlackTree article coverage changed from no BlackTree article to 1 BlackTree article.
    Before
    no BlackTree article
    After
    1 BlackTree article
    BlackTree editorial ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2025-17772↗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.
Free version - for non-commercial use only.CVE-2025-33071 · cve.blacktree.nl