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CVE record · CVE-2026-96951

Windows Shell Security Feature Bypass Vulnerability

CVSS 8.8 HighCriticalIn CISA KEVEPSS 0.098 · 95th percentile

Critical, because:

  • In CISA’s KEV catalogue since 13 Oct 2026: it is known to be exploited.

How we decide what’s critical

Published by the CVE Program (CNA: microsoft) at 13 Oct 2026, 19:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft Edge (Chromium-based)
  • affected 1.0.0.0 to before 154.0.4258.62 custom
Microsoft Outlook.com
  • affected 1.0.0 to before 20260925.100 custom
Microsoft Windows 10 Version 1607
  • affected 10.0.14393.0 to before 10.0.14393.9612 custom
Microsoft Windows 10 Version 1809
  • affected 10.0.17763.0 to before 10.0.17763.9376 custom
Microsoft Windows 10 Version 21H2
  • affected 10.0.19044.0 to before 10.0.19044.7807 custom
Microsoft Windows 10 Version 22H2
  • affected 10.0.19045.0 to before 10.0.19045.7807 custom
Microsoft Windows 11 version 23H2
  • affected 10.0.22631.0 to before 10.0.22631.7652 custom
Microsoft Windows 11 Version 23H2
  • affected 10.0.22631.0 to before 10.0.22631.7652 custom
Microsoft Windows 11 Version 24H2
  • affected 10.0.26100.0 to before 10.0.26100.9711 custom
Microsoft Windows 11 Version 25H2
  • affected 10.0.26200.0 to before 10.0.26200.9711 custom
Microsoft Windows 11 version 26H1
  • affected 10.0.28000.0 to before 10.0.28000.3231 custom
Microsoft Windows 11 Version 26H2
  • affected 10.0.26300.0 to before 10.0.26300.9711 custom
Microsoft Windows Server 2012 R2
  • affected 6.3.9600.0 to before 6.3.9600.23470 custom
Microsoft Windows Server 2012 R2 (Server Core installation)
  • affected 6.3.9600.0 to before 6.3.9600.23470 custom
Microsoft Windows Server 2016
  • affected 10.0.14393.0 to before 10.0.14393.9612 custom
Microsoft Windows Server 2016 (Server Core installation)
  • affected 10.0.14393.0 to before 10.0.14393.9612 custom
Microsoft Windows Server 2019
  • affected 10.0.17763.0 to before 10.0.17763.9376 custom
Microsoft Windows Server 2019 (Server Core installation)
  • affected 10.0.17763.0 to before 10.0.17763.9376 custom
Microsoft Windows Server 2022
  • affected 10.0.20348.0 to before 10.0.20348.5761 custom
Microsoft Windows Server 2025
  • affected 10.0.26100.0 to before 10.0.26100.33650 custom
Microsoft Windows Server 2025 (Server Core installation)
  • affected 10.0.26100.0 to before 10.0.26100.33650 custom
Identifiers
CVE-2026-96951
CNA
microsoft
Weakness (CWE)
CWE-77
Tags
Published
13 Oct 2026
Updated
31 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.8 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C CNA (microsoft)
  • CISA KEV Listed since 13 Oct 2026: known to be exploited.
  • EPSS 0.098, the 95th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 13 Oct 2026, 19:01 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 16:31 UTC First seen by agentprime

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.