HIGH · CVSS 8.8
ACTIVELY EXPLOITED
PATCH AVAILABLE
CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
| Vendor | Microsoft |
|---|---|
| Product | Windows |
| CVSS score | 8.8 · CVSS 3.1 · HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| EPSS | 9.8% (percentile 96) |
| Actively exploited | Yes, according to CISA KEV |
| Added to CISA KEV | 13 Oct 2026 |
| CISA federal deadline | 16 Oct 2026 |
| Weakness (CWE) | CWE-77 |
| NVD published | 13 Oct 2026 |
| NVD last modified | 29 Oct 2026 |
| NVD status | Analyzed |
Affected versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Outlook Web | – | – |
| Microsoft Windows 10 1607 | before 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows 10 1607 | before 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows 10 1809 | before 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows 10 1809 | before 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows 10 21H2 | before 10.0.19044.7807 | 10.0.19044.7807 |
| Microsoft Windows 10 21H2 | before 10.0.19044.7807 | 10.0.19044.7807 |
| Microsoft Windows 10 21H2 | before 10.0.19044.7807 | 10.0.19044.7807 |
| Microsoft Windows 10 22H2 | before 10.0.19045.7807 | 10.0.19045.7807 |
| Microsoft Windows 10 22H2 | before 10.0.19045.7807 | 10.0.19045.7807 |
| Microsoft Windows 10 22H2 | before 10.0.19045.7807 | 10.0.19045.7807 |
| Microsoft Windows 11 23H2 | before 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 23H2 | before 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 24H2 | before 10.0.26100.9711 | 10.0.26100.9711 |
| Microsoft Windows 11 24H2 | before 10.0.26100.9711 | 10.0.26100.9711 |
| Microsoft Windows 11 25H2 | before 10.0.26200.9711 | 10.0.26200.9711 |
| Microsoft Windows 11 25H2 | before 10.0.26200.9711 | 10.0.26200.9711 |
| Microsoft Windows 11 26H1 | before 10.0.28000.3231 | 10.0.28000.3231 |
| Microsoft Windows 11 26H1 | before 10.0.28000.3231 | 10.0.28000.3231 |
| Microsoft Windows 11 26H2 | before 10.0.26300.9711 | 10.0.26300.9711 |
+6 more
Required action (CISA's text)
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.
Description (NVD)
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.
Vendor advisories
SOURCES
Other Microsoft flaws
- patchtuesday:2026-11: Vulnerability in Microsoft
- CVE-2026-124194: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
- CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
- CVE-2026-81963: Microsoft Windows Link Following Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 29 Oct 2026.