Microsoft Windows Command Injection Vulnerability

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• cpe microsoft/outlookversion unspecified
• cpe microsoft/outlook webversion unspecified
• cpe microsoft/windows 10 1607version unspecified
• cpe microsoft/windows 10 1809version unspecified
• cpe microsoft/windows 10 21h2version unspecified
• vendor Microsoft Windowsversion unspecified

How to fix CVE-2026-96951

• Recommended remediation

  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. CISA due date Oct 16, 2026.

• Official advisories

  • Canadian Centre for Cyber Security · cyber.gc.ca
  • CERT-FR · cert.ssi.gouv.fr
  • CISA Cybersecurity Advisories · cisa.gov
  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Technology hubs

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Oct 13, 2026 · Catalog

   Detected

   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.

2. Oct 13, 2026 · CISA KEV

   Known exploited

   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

3. Oct 13, 2026 · Catalog

   Updated

   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.

4. Oct 14, 2026 · NIST NVD

   Updated

   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.

5. Oct 14, 2026 · NIST NVD

   Updated

   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.

6. Oct 15, 2026 · NIST NVD

   Updated

   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.

7. Oct 16, 2026 · CISA KEV

   Remediation due

   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

8. Oct 16, 2026 · NIST NVD

   Updated

   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.

Sources

• Canadian Centre for Cyber SecurityGovernment advisoryCVE-2026-96951

  Serial Number: AV26-1038 Date: October 13, 2026 As of October 13, 2026, Microsoft is affected by vulnerabilities in the following products: .NET 10.0 .NET 11.0 .NET 8.0 .NET 9.0 ASP.NET Core 10.0 ASP.NET Core 11.0 ASP.NET Core 8.0 ASP.NET Core 9.0 Arc Enabled Servers Azure API Ce

  cyber.gc.ca
• CERT-FRGovernment advisoryCVE-2026-96951

  De multiples vulnérabilités ont été découvertes dans Microsoft Windows. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et un déni de service à distance. Microsoft indique que la vulnérabilité

  cert.ssi.gouv.fr
• CISA Cybersecurity AdvisoriesGovernment advisoryCVE-2026-96951

  CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-96951 Microsoft Windows Command Injection Vulnerability CVE-2026-104935 Ivanti Connect Secure Authentication Bypass by Spoofing Vulnera

  cisa.gov
• CISA KEVConfirmed exploitationCVE-2026-96951

  Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.

  cisa.gov
• CVE.orgVulnerability recordCVE-2026-96951

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-96951

  30-day exploitation probability 1.5%

  first.org
• JPCERT/CCGovernment advisoryCVE-2026-96951

  Microsoft Releases October 2026 Security Updates

  jpcert.or.jp
• NCSC NetherlandsGovernment advisoryCVE-2026-96951

  Microsoft heeft xxx kwetsbaarheden verholpen in diverse Office producten, zoals Word, Excel, Access, Outlook, Visio, Sharepoint en PowerPoint, maar ook subcomponenten als Shell, Azure Key Vault en Click-to-Run. Een kwaadwillende kan de kwetsbaarheden misbruiken om een Denial-of-S

  advisories.ncsc.nl
• NIST NVDVulnerability recordCVE-2026-96951

  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.

  nvd.nist.gov
• Cisco TalosVendor advisoryCVE-2026-96951

  Microsoft has released its monthly security update for October 2026, which includes 1415 vulnerabilities affecting a range of products, including 85 that Microsoft marked as "critical."

  blog.talosintelligence.com
• Tenable CVE DatabaseVulnerability recordCVE-2026-96951

  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.

  tenable.com
• VulnCheck KEVConfirmed exploitationCVE-2026-96951

  Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.

  vulncheck.com

References

• VulnCheck exploitation evidence · api.msrc.microsoft.com
• VulnCheck exploitation evidence · docs.google.com
• CISA note · msrc.microsoft.com
• Reference · msrc.microsoft.com
• CISA note · nvd.nist.gov
• Reference · cisa.gov
• VulnCheck exploitation evidence · cisa.gov

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.