Microsoft Windows Command Injection
What to do
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 deadline 2026-10-16 · due in 2 days · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.
Who is affected
Microsoft Windows. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-77.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinedue in 2 days
Sources
- NVD entry for CVE-2026-96951 nvd.nist.gov/vuln/detail/CVE-2026-96951
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- msrc.microsoft.com msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-96951
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2026-96951