CVE-2026-96951 (GCVE-0-2026-96951)

Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-14 17:59
VLAI CISA Previdian
Title
Windows Shell Security Feature Bypass Vulnerability
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.
Severity
8.8 (High)
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
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 00:00 UTC
CWE
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
microsoft CNA under the mitre root
CNA scorecard B 82/100 over 3923 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Microsoft Outlook.com Affected: 1.0.0 , < 20260925.100 (custom)
guessed Create a notification for this product.
Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.9612 (custom)
guessed Create a notification for this product.
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.9376 (custom)
guessed Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7807 (custom)
guessed Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19044.7807 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7652 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7652 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.9711 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.9711 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.3231 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 26H2 Affected: 10.0.26300.0 , < 10.0.26300.9711 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.23470 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.23470 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.9612 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.9612 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.9376 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.9376 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5761 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33650 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33650 (custom)
guessed Create a notification for this product.
Date Public
2026-10-13 14:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fb185b63-ff30-4d38-821a-39bef7f7e7d9

Vulnerability ID: CVE-2026-96951

Status: Confirmed

Status Updated: 2026-10-13 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-10-13
Asserted: 2026-10-13
Scope
Notes: Microsoft Windows Command Injection Vulnerability | Affected: Microsoft / Windows | Description: Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network. | 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. | Due date: 2026-10-16 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-96951 ; BOD 26-04: BOD 26-04: Prioritizing Security Updates Based on Risk | CISA ; Forensics Triage Requirements: BOD 26-04: Implementation Guidance for Prioritizing Security Updates Based on Risk | CISA ; https://nvd.nist.gov/vuln/detail/CVE-2026-96951
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-77
Feed CISA Known Exploited Vulnerabilities Catalog
Product Windows
Due Date 2026-10-16
Date Added 2026-10-13
Vendorproject Microsoft
Vulnerabilityname Microsoft Windows Command Injection Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-10-13 20:00 UTC | Updated: 2026-10-13 20:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 7def5bf7-94c5-4110-ba1c-84404031ca45

Vulnerability ID: CVE-2026-96951

Status: Confirmed

Status Updated: 2026-10-13 07:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-10-13
Asserted: 2026-10-13
Scope
Notes: Windows Shell Security Feature Bypass Vulnerability | Affected: Microsoft / Outlook.com, Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2025, Windows Server 2025 (Server Core installation) | CVSS: 8.8 (HIGH) | Used in malware: unknown | Listed 13 hours ahead of CISA KEV | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Windows Shell Security Feature Bypass Vulnerability
Cve Id CVE-2026-96951
Vendor Microsoft
Ghsa Id None
Product Outlook.com, Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2025, Windows Server 2025 (Server Core installation)
Added Date 2026-10-13T07:00:00.000Z
Cvss Score 8.8
Epss Score None
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile None
Used In Malware unknown
Vulnerability Id CVE-2026-96951
Ahead Of Cisa Kev 
{
  "count": 13,
  "unit": "hour"
}
Not Yet In Cisa Kev False
References
Created: 2026-10-14 07:00 UTC | Updated: 2026-10-14 07:00 UTC
Show details on NVD website
To clipboard 

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  }
}



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Sightings

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