# CVE-2026-85844

Windows Kerberos auth bypass enables network privilege escalation.

- Page: https://www.vulneraibility.com/cve/CVE-2026-85844
- CVSS: 9.8
- Known exploited: not in CISA KEV as of our last sync
- CISA SSVC: exploitation none, automatable yes, technical impact total (assessed 2026-11-05)
- Weakness: CWE-288
- Published: 2026-11-10

## Affected versions

- Microsoft Windows 10 Version 1607: affected >= 10.0.14393.0 and < 10.0.14393.9688
- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.9487
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19044.0 and < 10.0.19044.7846
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.7846
- Microsoft Windows 11 version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.7711
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.7711
- Microsoft Windows 11 Version 24H2: affected >= 10.0.26100.0 and < 10.0.26100.9974
- Microsoft Windows 11 Version 25H2: affected >= 10.0.26200.0 and < 10.0.26200.9974
- Microsoft Windows 11 version 26H1: affected >= 10.0.28000.0 and < 10.0.28000.3501
- Microsoft Windows 11 Version 26H2: affected >= 10.0.26300.0 and < 10.0.26300.9974
- Microsoft Windows Server 2012: affected >= 6.2.9200.0 and < 6.2.9200.26434
- Microsoft Windows Server 2012 R2: affected >= 6.3.9600.0 and < 6.3.9600.23470
- Microsoft Windows Server 2012 R2 (Server Core installation): affected >= 6.3.9600.0 and < 6.3.9600.23470
- Microsoft Windows Server 2012 (Server Core installation): affected >= 6.2.9200.0 and < 6.2.9200.26434
- Microsoft Windows Server 2016: affected >= 10.0.14393.0 and < 10.0.14393.9688
- Microsoft Windows Server 2016 (Server Core installation): affected >= 10.0.14393.0 and < 10.0.14393.9688
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.9487
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.9487
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.5870
- Microsoft Windows Server 2025: affected >= 10.0.26100.0 and < 10.0.26100.33822
- Microsoft Windows Server 2025 (Server Core installation): affected >= 10.0.26100.0 and < 10.0.26100.33822

A version outside these ranges is not a statement that it is unaffected.

## Impact

Bypass Kerberos authentication to elevate privileges over a network, enabling lateral movement, domain compromise, and actions as elevated accounts.

## Action

Immediate action required

## Recommendation

Apply Microsoft security update immediately; restrict DC access and monitor auth logs.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85844

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.