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Vulnerabilities

Vulnerability · CVE-2023-29336

Microsoft Win32K Privilege Escalation Vulnerability

Published May 9, 2023 · catalog updated Jun 16, 2026 · Microsoft Win32k

Patch now

CVE-2023-29336 is in the CISA known-exploited catalog, due May 30, 2023. Confirm Microsoft Win32k against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High7.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
41.19%
Remediation
Remediation guidance
Affected products
cpe microsoft/windows 10 1507 · cpe microsoft/windows 10 1607 · cpe microsoft/windows server 2008 · cpe microsoft/windows server 2012 · cpe microsoft/windows server 2016 · vendor Microsoft Win32k

Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.

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.

  • cpe microsoft/windows 10 1507version unspecified
  • cpe microsoft/windows 10 1607version unspecified
  • cpe microsoft/windows server 2008r2
  • cpe microsoft/windows server 2012r2
  • cpe microsoft/windows server 2016version unspecified
  • vendor Microsoft Win32kversion unspecified

How to fix CVE-2023-29336

What to do

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

Should you patch?

CVE-2023-29336 is in the CISA known-exploited catalog, due May 30, 2023. Confirm Microsoft Win32k against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with microsoft/windows server 2008 r2; microsoft/windows server 2012 r2. Apply updates per vendor instructions.

What should an analyst verify?

CWE-416: Use After Free. EPSS 41.19%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. 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. May 9, 2023 · Catalog

    Detected

    Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.

  2. May 9, 2023 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 30, 2023 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.

Sources

  • CISA KEVConfirmed exploitationCVE-2023-29336

    Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2023-29336

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-29336

    30-day exploitation probability 41.2%

    first.org
  • Exploit DatabasePublic exploit reference52301

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • NIST NVDVulnerability recordCVE-2023-29336

    Win32k Elevation of Privilege Vulnerability

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2023-29336

    Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.