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7.8
CVE-2026-81963KEVEXPLOITEDPATCHED
microsoft · windows_11_23h2

Windows Update Stack Elevation of Privilege Vulnerability

Description

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

Affected Products

VendorProductVersions
microsoftwindows_11_23h210.0.22631.0, 10.0.22631.0, 10.0.26100.0, 10.0.26200.0, 10.0.28000.0, 10.0.26100.0, 10.0.26100.0

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
microsoftwindows_server_2025cve_cpe95%
microsoftwindows_11_25h2cve_cpe95%
microsoftwindows_11_26h1cve_cpe95%
microsoftwindows_11_24h2cve_cpe95%
microsoftmicrosoft windows server 2012 r2cert_advisory90%

References

  • https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81963(vendor-advisory, patch)

Related News (16 articles)

Tier E
Hacker News1h ago
Live CVE Feed to Keep Your Agent Up to Speed
→ No new info (linked only)
Tier D
Help Net Security21d ago
October 2026 Patch Tuesday forecast: Time for an Office cleanup
→ No new info (linked only)
Tier B
BSI Advisories51d ago
[NEU] [kritisch] Microsoft Windows: Mehrere Schwachstellen
→ No new info (linked only)
Tier D
Heise Security51d ago
Microsoft schließt Rekordzahl an Sicherheitslücken
→ No new info (linked only)
Tier D
The Hacker News51d ago
Microsoft Patches Record 974 Flaws, Including Two Exploited Windows Zero-Days
→ No new info (linked only)
Tier C
VulDB51d ago
CVE-2026-81963 | Microsoft Windows up to Server 2025 Update Stack privileges management
→ No new info (linked only)
Tier D
CSO Online51d ago
September 2026 Patch Tuesday roundup: Plugs for two zero day holes among almost 1,000 fixes in Windows
→ No new info (linked only)
Tier B
CERT-FR52d ago
Multiples vulnérabilités dans Microsoft Windows (09 septembre 2026)
→ No new info (linked only)
Tier C
Cisco Talos52d ago
Microsoft Patch Tuesday for September 2026 — Snort rules and prominent vulnerabilities
→ No new info (linked only)
Tier C
Krebs on Security52d ago
Microsoft Plugs Nearly 1,000 Security Holes
→ No new info (linked only)
Tier C
Rapid7 Blog52d ago
Patch Tuesday - September 2026
→ No new info (linked only)
Tier D
Dark Reading52d ago
Patch Tuesday Sets Another Record With 974 CVEs
→ No new info (linked only)
Tier C
Qualys Blog52d ago
Microsoft and Adobe Patch Tuesday, September 2026 Security Update Review
→ No new info (linked only)
Tier B
CCCS Canada52d ago
Microsoft security advisory – September 2026 monthly rollup (AV26-896) – Update 1
→ No new info (linked only)
Tier A
Microsoft MSRC52d ago
CVE-2026-81963 Windows Update Stack Elevation of Privilege Vulnerability
→ No new info (linked only)
Tier C
CrowdStrike Blog52d ago
September 2026 Patch Tuesday: Two Exploited Zero-Days and 113 Critical Vulnerabilities Among 972 CVEs
→ No new info (linked only)

Discussion (0)

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CVSS 3.17.8 HIGH
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CISA KEV✅ Yes
Actively exploited✅ Yes
Patch available
10.0.22631.758210.0.26100.944510.0.26200.944510.0.28000.295410.0.26100.33438
CWECWE-59, CWE-284
PublishedSep 8, 2026
Last enriched52d ago
Trending Score157🔥
Source articles16
Independent16
Info Completeness3/14
Missing: vendor, product, versions, cvss, epss, cwe, kev, exploit, patch, iocs, mitre_attack

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Verification

State: verified
Confidence: 0%

Vulnerability Timeline

CVE Published
Sep 8, 2026
Added to CISA KEV
Sep 8, 2026
Discovered by ZDM
Sep 8, 2026
Actively Exploited
Oct 14, 2026
Patch Available
Oct 14, 2026