CVE-2025-33071Microsoft Windows Server Use After Free
NVDCVSS scored by secure@microsoft.com
Vulnerability Summary
Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.
CVSS v3.1 Base Metrics — Score 8.1 (HIGH)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HAttack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Affected & Patched Versions
- Microsoft Windows Server 2012
- Microsoft Windows Server 2016 < 10.0.14393.8148
- Microsoft Windows Server 2019 < 10.0.17763.7434
- Microsoft Windows Server 2022 < 10.0.20348.3745
- Microsoft Windows Server 2022 23h2 < 10.0.25398.1665
- Microsoft Windows Server 2025 < 10.0.26100.4270
- Microsoft Windows Server 2016 10.0.14393.8148
- Microsoft Windows Server 2019 10.0.17763.7434
- Microsoft Windows Server 2022 10.0.20348.3745
- Microsoft Windows Server 2022 23h2 10.0.25398.1665
- Microsoft Windows Server 2025 10.0.26100.4270
What to do
Plan remediation soon. No exploitation is confirmed yet, but the severity is high.
- Check whether you run Microsoft Windows Server and which version.
- Update to a patched version listed above, then confirm the new version.
Timeline
- Jun 10, 2025Published
- Jul 8, 2025Record last modified
Score, severity and exploitation changes are tracked from the day Watchtower started logging them.
Get notified about new Microsoft CVEsYou are reading CVE-2025-33071. Get an email when KEV listings, exploits or new CVEs match your stack.
Notify me about Microsoft CVEsMore Microsoft Windows Server CVEs
All Microsoft vulnerabilities →
External References
Data last checked: Nov 14, 2026 18:19 UTC