Elevation of Privilege Vulnerability in Windows Authentication by Microsoft
CVE-2026-25171

7HIGH

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 March 2026

What is CVE-2026-25171?

A use after free vulnerability in Windows Authentication Methods can allow an authorized attacker to gain elevated privileges locally. This issue arises from insufficient validation of existing memory, potentially allowing unauthorized access to sensitive resources. Organizations are encouraged to apply available patches to mitigate the risks associated with this vulnerability.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8957

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8511

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7058

References

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

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.