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CVE-2026-25187

Winlogon Elevation of Privilege Vulnerability

Basic Information

CVE State
PUBLISHED
Reserved Date
January 29, 2026
Published Date
March 10, 2026
Last Updated
May 26, 2026
Vendor
Microsoft
Product
Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Description
Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

CVSS Scores

CVSS v3.1

7.8 - HIGH

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC Information

Exploitation
none
Technical Impact
total

Exploit Status

Exploited in the Wild
Yes (2026-04-19 13:49:43 UTC) Source

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25187

Known Exploited Vulnerability Information

Source Added Date
The Shadowserver (via CIRCL) 2026-04-19 13:49:43 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel