CVE-2026-81963: microsoft windows_11_23h2, microsoft windows_11_24h2, microsoft windows_11_25h2

CVSS 7.8 (high) · listed as exploited by CISA since 2026-09-08 · published 2026-09-08

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Affected products (NVD): microsoft windows_11_23h2, microsoft windows_11_24h2, microsoft windows_11_25h2, microsoft windows_11_26h1, microsoft windows_server_2025

Fixed in (NVD): 10.0.22631.7582, 10.0.26100.9445, 10.0.26200.9445, 10.0.28000.2954, 10.0.26100.33438

Weakness: CWE-59, CWE-284

Source: NVD CVE-2026-81963

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81963
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81963

Check your software

Connect an AI agent to the FixLane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.