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Vulnerabilities

Vulnerability · CVE-2026-96323

Windows Update Elevation of Privilege Vulnerability

Published Oct 13, 2026 · catalog updated Oct 16, 2026 · Microsoft Windows 10 Version 21H2

Check if you run it

No confirmed exploitation is on record for CVE-2026-96323. EPSS is 0.25%. Act only if a listed version of Microsoft Windows 10 Version 21H2 is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Advisory link
Affected products
vendor Microsoft Windows 10 Version 21H2 · vendor Microsoft Windows 10 Version 22H2 · vendor Microsoft Windows 11 Version 23H2 · vendor Microsoft Windows 11 Version 24H2 · vendor Microsoft Windows 11 Version 25H2 · vendor Microsoft Windows 11 Version 26H2

Use after free in Windows Update allows an authorized attacker to elevate privileges locally.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Microsoft Windows 10 Version 21H2version unspecified
  • vendor Microsoft Windows 10 Version 22H2version unspecified
  • vendor Microsoft Windows 11 Version 23H2version unspecified
  • vendor Microsoft Windows 11 Version 24H2version unspecified
  • vendor Microsoft Windows 11 Version 25H2version unspecified
  • vendor Microsoft Windows 11 Version 26H2version unspecified
  • vendor Microsoft Windows 11 version 23H2version unspecified
  • vendor Microsoft Windows 11 version 26H1version unspecified

How to fix CVE-2026-96323

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-96323. EPSS is 0.25%. Act only if a listed version of Microsoft Windows 10 Version 21H2 is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · Tenable CVE Database

    Detected

    Use after free in Windows Update allows an authorized attacker to elevate privileges locally.

  2. Oct 16, 2026 · CVE.org

    Updated

    Use after free in Windows Update allows an authorized attacker to elevate privileges locally.

Sources

  • CVE.orgVulnerability recordCVE-2026-96323

    Use after free in Windows Update allows an authorized attacker to elevate privileges locally.

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-96323

    30-day exploitation probability 0.2%

    first.org
  • Tenable CVE DatabaseVulnerability recordCVE-2026-96323

    Use after free in Windows Update allows an authorized attacker to elevate privileges locally.

    tenable.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.