CVE-2026-96951
KEV: known exploited SSVC: activeWindows Shell Security Feature Bypass Vulnerability
CVSS v3.1 (listed by NVD)
8.8
HIGH
Scored by microsoft.com (not yet scored by NVD)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0 (listed by NVD)
—
Not scored
CVSS (listed by CVE.org)
8.8
HIGH
Scored by CNA (microsoft) · v3.1
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
EPSS exploit probability
1.5%
Percentile 74.3%
as of 2026-10-24
CISA KEV
Listed
Added 2026-10-13 / due 2026-10-16
Ransomware use: Unknown
SSVC (CISA ADP)
active
Automatable: no / Impact: total
Attack conditions and impact
Derived from the CNA (via NVD) CVSS 3.1 vector
NetworkNo authUser action
Exploit code
Confidentiality HIntegrity HAvailability H
| Metric | Value | Meaning |
|---|---|---|
| Attack vector AV | N | Network |
| Attack complexity AC | L | Low (easy) |
| Privileges required PR | N | None |
| User interaction UI | R | Required |
| Scope S | U | Unchanged |
| Confidentiality C | H | High |
| Integrity I | H | High |
| Availability A | H | High |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
CISA KEV entry
Microsoft Windows Command Injection Vulnerability — Microsoft / Windows
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.
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
CVSS assessments
| Provider | Version | Score | Vector |
|---|---|---|---|
| NVD / [email protected] (Secondary) | 3.1 | 8.8 HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA / microsoft | 3.1 | 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 |
Affected products and packages
CNA (CVE.org)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Outlook.com | affected: 1.0.0 … < 20260925.100 |
| Microsoft | Windows 10 Version 1607 | affected: 10.0.14393.0 … < 10.0.14393.9612 |
| Microsoft | Windows 10 Version 1809 | affected: 10.0.17763.0 … < 10.0.17763.9376 |
| Microsoft | Windows 10 Version 21H2 | affected: 10.0.19044.0 … < 10.0.19044.7807 |
| Microsoft | Windows 10 Version 22H2 | affected: 10.0.19045.0 … < 10.0.19045.7807 |
| Microsoft | Windows 11 version 23H2 | affected: 10.0.22631.0 … < 10.0.22631.7652 |
| Microsoft | Windows 11 Version 23H2 | affected: 10.0.22631.0 … < 10.0.22631.7652 |
| Microsoft | Windows 11 Version 24H2 | affected: 10.0.26100.0 … < 10.0.26100.9711 |
| Microsoft | Windows 11 Version 25H2 | affected: 10.0.26200.0 … < 10.0.26200.9711 |
| Microsoft | Windows 11 version 26H1 | affected: 10.0.28000.0 … < 10.0.28000.3231 |
| Microsoft | Windows 11 Version 26H2 | affected: 10.0.26300.0 … < 10.0.26300.9711 |
| Microsoft | Windows Server 2012 R2 | affected: 6.3.9600.0 … < 6.3.9600.23470 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | affected: 6.3.9600.0 … < 6.3.9600.23470 |
| Microsoft | Windows Server 2016 | affected: 10.0.14393.0 … < 10.0.14393.9612 |
| Microsoft | Windows Server 2016 (Server Core installation) | affected: 10.0.14393.0 … < 10.0.14393.9612 |
| Microsoft | Windows Server 2019 | affected: 10.0.17763.0 … < 10.0.17763.9376 |
| Microsoft | Windows Server 2019 (Server Core installation) | affected: 10.0.17763.0 … < 10.0.17763.9376 |
| Microsoft | Windows Server 2022 | affected: 10.0.20348.0 … < 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | affected: 10.0.26100.0 … < 10.0.26100.33650 |
| Microsoft | Windows Server 2025 (Server Core installation) | affected: 10.0.26100.0 … < 10.0.26100.33650 |
NVD CPE (26)
Show CPE list
| Vendor | Product | Range | CPE |
|---|---|---|---|
| microsoft | outlook_web | cpe:2.3:a:microsoft:outlook_web:-:*:*:*:*:*:*:* | |
| microsoft | windows_10_1607 | < 10.0.14393.9612 | cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1607 | < 10.0.14393.9612 | cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* |
| microsoft | windows_10_1809 | < 10.0.17763.9376 | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 | < 10.0.17763.9376 | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* |
| microsoft | windows_10_21h2 | < 10.0.19044.7807 | cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_21h2 | < 10.0.19044.7807 | cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_21h2 | < 10.0.19044.7807 | cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* |
| microsoft | windows_10_22h2 | < 10.0.19045.7807 | cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_22h2 | < 10.0.19045.7807 | cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_22h2 | < 10.0.19045.7807 | cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* |
| microsoft | windows_11_23h2 | < 10.0.22631.7652 | cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_23h2 | < 10.0.22631.7652 | cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* |
| microsoft | windows_11_24h2 | < 10.0.26100.9711 | cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_24h2 | < 10.0.26100.9711 | cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* |
| microsoft | windows_11_25h2 | < 10.0.26200.9711 | cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_25h2 | < 10.0.26200.9711 | cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* |
| microsoft | windows_11_26h1 | < 10.0.28000.3231 | cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h1 | < 10.0.28000.3231 | cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* |
| microsoft | windows_11_26h2 | < 10.0.26300.9711 | cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h2 | < 10.0.26300.9711 | cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2012 | cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* | |
| microsoft | windows_server_2016 | < 10.0.14393.9612 | cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2019 | < 10.0.17763.9376 | cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2022 | < 10.0.20348.5761 | cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2025 | < 10.0.26100.33650 | cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* |
Linux distribution status
References (2)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951 NVD, CNA PatchVendor Advisoryvendor-advisorypatch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96951 NVD, ADP CISA-ADP US Government Resourcegovernment-resource