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CVE-2026-96951

high CISA KEV

Microsoft Windows Command Injection Vulnerability

Vendor / product: Microsoft — Windows

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.

CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-10-13 19:22
Modified: 2026-10-16 17:18
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2026-10-13 · due 2026-10-16
Known ransomware use: Unknown

Required action (CISA)

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.

Affected products

microsoft / outlook_web all versions
microsoft / windows_10_1607 <10.0.14393.9612
microsoft / windows_10_1809 <10.0.17763.9376
microsoft / windows_10_21h2 <10.0.19044.7807
microsoft / windows_10_22h2 <10.0.19045.7807
microsoft / windows_11_23h2 <10.0.22631.7652
microsoft / windows_11_24h2 <10.0.26100.9711
microsoft / windows_11_25h2 <10.0.26200.9711
microsoft / windows_11_26h1 <10.0.28000.3231
microsoft / windows_11_26h2 <10.0.26300.9711
microsoft / windows_server_2012 r2
microsoft / windows_server_2016 <10.0.14393.9612
microsoft / windows_server_2019 <10.0.17763.9376
microsoft / windows_server_2022 <10.0.20348.5761
microsoft / windows_server_2025 <10.0.26100.33650

Weakness classification (CWE)

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951

References

Data sources

CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗

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