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CVE-2023-29336

Microsoft Win32K Privilege Escalation

7.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 41.2%
  1. Published9 May 2023
  2. Added to CISA KEV9 May 2023
  3. Remediation due30 May 2023
Actively exploited (CISA KEV)

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

Added to KEV: 9 May 2023Federal remediation due: 30 May 2023

Description

Win32k Elevation of Privilege Vulnerability

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1507< 10.0.10240.19926
Microsoft Windows 10 1607< 10.0.14393.5921
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016all versions

Remediation

Fixed in
Microsoft Windows 10 1507≥ 10.0.10240.19926
Microsoft Windows 10 1607≥ 10.0.14393.5921

References

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Frequently asked

Is CVE-2023-29336 being actively exploited?

Yes. CVE-2023-29336 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 9 May 2023.

How severe is CVE-2023-29336?

CVE-2023-29336 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 41.2% probability of exploitation.

Which products are affected by CVE-2023-29336?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016.

How do I fix CVE-2023-29336?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.19926, Microsoft Windows 10 1607 10.0.14393.5921 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-29336 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.