HIGH 7.8 NVD ACTIVELY EXPLOITED

CVE-2026-81963

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

Affected Products

microsoft/windows_11_23h2
microsoft/windows_11_24h2
microsoft/windows_11_25h2
microsoft/windows_11_26h1
microsoft/windows_server_2025

References

Published: 2026-09-08 · Source: NVD · Feed updated: 2026-09-11

This high severity vulnerability with a CVSS score of 7.8 was published on 2026-09-08 via NVD. ⚠ This vulnerability is in the CISA Known Exploited Vulnerabilities (KEV) catalog — it is being actively exploited in the wild. Affected: microsoft/windows_11_23h2, microsoft/windows_11_24h2, microsoft/windows_11_25h2 and 2 more.

Risk Timeline

CVE Disclosed2026-09-08 · 2 days ago

CISA KEV — Actively ExploitedU.S. federal agencies required to patch · confirmed threat-actor activity

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81963

CISA / KEV

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-202

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2026-83711	Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-63508	Microsoft Planetary Computer Pro Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-65667	Microsoft Teams Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-65801	Microsoft Exchange Online Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-69836	Microsoft Entra ID Remote Code Execution Vulnerability	CRITICAL	10.0
CVE-2026-56191	Microsoft Exchange Online Tampering Vulnerability	CRITICAL	10.0

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