Weak Authentication in Windows Kerberos Elevates Privileges
CVE-2026-122164

8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1607
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Vendor
CVE Published:
10 November 2026

What is CVE-2026-122164?

An identified weakness in the authentication mechanism of Windows Kerberos allows an authorized attacker to manipulate user privileges, thereby gaining elevated access over a network. This vulnerability poses a significant risk to system integrity and requires immediate attention to protect against unauthorized privilege escalation.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.9688

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9487

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7846

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.