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Fencer Intel
high 8.8

CVE-2026-96951 kev in the critical feed json

Windows Shell Security Feature Bypass Vulnerability

published 29d ago modified yesterday also EUVD-2026-100274

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2026-10-13
epss
9.8%
EPSS 9.8% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

Patch / fix

cisa required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

  • Microsoft Microsoft Edge (Chromium-based) 154.0.4258.62
  • Microsoft Outlook.com 20260925.100
  • Microsoft Windows 10 Version 1607 10.0.14393.9612
  • Microsoft Windows 10 Version 1809 10.0.17763.9376
  • Microsoft Windows 10 Version 21H2 10.0.19044.7807
  • Microsoft Windows 10 Version 22H2 10.0.19045.7807
  • Microsoft Windows 11 version 23H2 10.0.22631.7652
  • Microsoft Windows 11 Version 24H2 10.0.26100.9711
  • Microsoft Windows 11 Version 25H2 10.0.26200.9711
  • Microsoft Windows 11 version 26H1 10.0.28000.3231
  • Microsoft Windows 11 Version 26H2 10.0.26300.9711
  • Microsoft Windows Server 2012 R2 6.3.9600.23470
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.23470
  • Microsoft Windows Server 2016 10.0.14393.9612
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9612
  • Microsoft Windows Server 2019 10.0.17763.9376
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.9376
  • Microsoft Windows Server 2022 10.0.20348.5761
  • Microsoft Windows Server 2025 10.0.26100.33650
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33650

Is CVE-2026-96951 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. CISA SSVC: exploitation active
  2. 0-day patched (Project Zero)
  3. Added to CISA KEV
  4. Published
  5. CISA patch deadline

Known exploited

Added
30d ago
Patch by
2026-10-16 (27d ago)
Ransomware
Not known
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vendor, product
Microsoft, Windows
CISA name
Microsoft Windows Command Injection Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched
2026-10-13
Details
project zero tracker

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

9.81% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 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 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Microsoft Edge (Chromium-based)
  • Microsoft Outlook.com
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows 11 Version 26H2
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.