---
title: "CVE-2026-96951: Microsoft Windows Command Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-96951/
description: "CVE-2026-96951 (Microsoft Windows): Exploited in the wild (CISA KEV). Improper neutralization of special elements used in a command ('command injection') in…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-13
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-96951"
kev: true
cvss: 8.8
epss: 0.01512
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-96951: Microsoft Windows Command Injection Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Microsoft Windows. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-10-13, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-10-16 ; treat that as the outer limit, not the target.
- EPSS 1.5% , percentile 74: FIRST’s model estimates a 1.5% chance of exploitation activity in the next 30 days, higher than 74% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Editorial verdict: Patch this week. Windows Shell CVE-2026-96951: Exploited MOTW Bypass — Roll the October 2026 Windows update out to every desktop this week; attackers are using this to make malicious attachments and downloads skip the warnings that would stop them.

## What it is

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.

## Affected products (CVE record)

- Microsoft Outlook.com: 1.0.0 < 20260925.100
- Microsoft Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.9612
- Microsoft Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.9376
- Microsoft Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.7807
- Microsoft Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.7807
- Microsoft Windows 11 version 23H2: 10.0.22631.0 < 10.0.22631.7652
- Microsoft Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.7652
- Microsoft Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.9711
- Microsoft Windows 11 Version 25H2: 10.0.26200.0 < 10.0.26200.9711
- Microsoft Windows 11 version 26H1: 10.0.28000.0 < 10.0.28000.3231

## Severity

- microsoft CVSS 3.1: 8.8 `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`

## Exploitation

- CISA KEV: added 2026-10-13; federal due date 2026-10-16. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.51% probability of exploitation activity in the next 30 days; percentile 74.

## Sources

- [Windows Shell Security Feature Bypass Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951)
- [Listed in CISA KEV notes (msrc.microsoft.com)](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-96951)
- [CVE.org record CVE-2026-96951](https://www.cve.org/CVERecord?id=CVE-2026-96951)
- [NVD entry CVE-2026-96951](https://nvd.nist.gov/vuln/detail/CVE-2026-96951)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96951)

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Source page: https://erroneo.us/security/cve/CVE-2026-96951/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt