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CVE-2026-96951: Microsoft Windows Command Injection Vulnerability

Microsoft · Windows

Listed by CISA as exploited in the wild since 13 Oct 2026. Below: exploitation status, EPSS and every published CVSS, each with its source, then affected versions and references.

Build snapshot collected · KEV catalog 2026.10.21 · EPSS of 21 Oct 2026 · not a live feed: collected once, at build time

Description

as written by CISA (KEV catalog)

Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.

Required action

CISA KEV

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 and versions

CVE record · microsoft

  • Microsoft · Outlook.com

    • affected: from 1.0.0 before 20260925.100

  • Microsoft · Windows 10 Version 1607

    • affected: from 10.0.14393.0 before 10.0.14393.9612

  • Microsoft · Windows 10 Version 1809

    • affected: from 10.0.17763.0 before 10.0.17763.9376

  • Microsoft · Windows 10 Version 21H2

    • affected: from 10.0.19044.0 before 10.0.19044.7807

  • Microsoft · Windows 10 Version 22H2

    • affected: from 10.0.19045.0 before 10.0.19045.7807

  • Microsoft · Windows 11 version 23H2

    • affected: from 10.0.22631.0 before 10.0.22631.7652

  • Microsoft · Windows 11 Version 23H2

    • affected: from 10.0.22631.0 before 10.0.22631.7652

  • Microsoft · Windows 11 Version 24H2

    • affected: from 10.0.26100.0 before 10.0.26100.9711

  • Microsoft · Windows 11 Version 25H2

    • affected: from 10.0.26200.0 before 10.0.26200.9711

  • Microsoft · Windows 11 version 26H1

    • affected: from 10.0.28000.0 before 10.0.28000.3231

  • Microsoft · Windows 11 Version 26H2

    • affected: from 10.0.26300.0 before 10.0.26300.9711

  • Microsoft · Windows Server 2012 R2

    • affected: from 6.3.9600.0 before 6.3.9600.23470

  • Microsoft · Windows Server 2012 R2 (Server Core installation)

    • affected: from 6.3.9600.0 before 6.3.9600.23470

  • Microsoft · Windows Server 2016

    • affected: from 10.0.14393.0 before 10.0.14393.9612

  • Microsoft · Windows Server 2016 (Server Core installation)

    • affected: from 10.0.14393.0 before 10.0.14393.9612

  • Microsoft · Windows Server 2019

    • affected: from 10.0.17763.0 before 10.0.17763.9376

  • Microsoft · Windows Server 2019 (Server Core installation)

    • affected: from 10.0.17763.0 before 10.0.17763.9376

  • Microsoft · Windows Server 2022

    • affected: from 10.0.20348.0 before 10.0.20348.5761

  • Microsoft · Windows Server 2025

    • affected: from 10.0.26100.0 before 10.0.26100.33650

  • Microsoft · Windows Server 2025 (Server Core installation)

    • affected: from 10.0.26100.0 before 10.0.26100.33650

Status words (affected, unaffected, unknown) and version bounds are copied from the record. An upper bound such as “before 7.1.0” usually marks the first fixed version; confirm in the vendor advisory before planning an upgrade.

References

CISA KEV notes and CVE record

EPSS over the last 30 days

See also: all Microsoft entries in KEV · the full KEV catalog

Related entries

Other Microsoft entries in KEV

Added in the same week (see the week)

Questions about CVE-2026-96951

Is CVE-2026-96951 being exploited?

Yes, according to CISA. CVE-2026-96951 was added to the Known Exploited Vulnerabilities catalog on 13 Oct 2026, which CISA does only with reliable evidence of exploitation in the wild. The catalog field for ransomware campaign use says "Unknown".

What is the deadline to remediate CVE-2026-96951?

CISA set 16 Oct 2026 as the due date for US Federal Civilian Executive Branch agencies. The date is binding only for those agencies; other organisations can read it as a measure of urgency.

What is the EPSS score of CVE-2026-96951?

1.51%, in the 74th percentile, in the FIRST EPSS model of 21 Oct 2026. It estimates the probability of exploitation activity in the following 30 days. For a CVE already in KEV the score is secondary: exploitation has been observed.

How severe is CVE-2026-96951?

microsoft rates it 8.8 HIGH (CVSS 3.1). These are the published assessments as of 22 Oct 2026; this site does not rescore.

Which product does CVE-2026-96951 affect?

Microsoft Windows, as named in the CISA catalog. The affected versions listed in the CVE record are on this page; the vendor advisory in the references is the authority on fixed versions.

Related sections