Vulnerability report

Trusted Third Party Report Confirmed Confidence In CISA KEV

CVE-2023-29336

Win32k Elevation of Privilege Vulnerability

Microsoft / Windows 10 Version 1507 · affected before 10.0.10240.19926

Watch CVE-2023-29336 Browse KEV feed
Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Trusted Third Party Report
EPSS
41.2%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2023-29336 is Win32k Elevation of Privilege Vulnerability affecting Microsoft Windows 10 Version 1507 and 12 other products.

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Affected products include Microsoft / Windows 10 Version 1507 and 12 other products, including affected before 10.0.10240.19926, affected before 10.0.14393.5921, and affected before 6.0.6003.22070.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Win32k Elevation of Privilege Vulnerability

Win32k Elevation of Privilege Vulnerability

Microsoft Affected
Windows 10 Version 1507
Before 10.0.10240.19926
Microsoft Affected
Windows 10 Version 1607
Before 10.0.14393.5921
Microsoft Affected
Windows Server 2016
Before 10.0.14393.5921
Microsoft Affected
Windows Server 2016 (Server Core installation)
Before 10.0.14393.5921
Microsoft Affected
Windows Server 2008 Service Pack 2
Before 6.0.6003.22070
Microsoft Affected
Windows Server 2008 Service Pack 2 (Server Core installation)
Before 6.0.6003.22070
Microsoft Affected
Windows Server 2008 Service Pack 2
Before 6.0.6003.22070
Microsoft Affected
Windows Server 2008 R2 Service Pack 1
Before 6.1.7601.26519
Microsoft Affected
Windows Server 2008 R2 Service Pack 1 (Server Core installation)
Before 6.1.7601.26519
Microsoft Affected
Windows Server 2012
Before 6.2.9200.24266
Microsoft Affected
Windows Server 2012 (Server Core installation)
Before 6.2.9200.24266
Microsoft Affected
Windows Server 2012 R2
Before 6.3.9600.20969
Microsoft Affected
Windows Server 2012 R2 (Server Core installation)
Before 6.3.9600.20969
View vendor advisory (opens in new tab)
Published
09 May 2023
Exploitation Attempts Reported
09 May 2023
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None

Tags

microsoft nessus_scanner windows cisa

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation Attempts Observed in the Wild

CISA

Recorded 09 May 2023

A trusted third party reported exploitation attempts.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2023-05-09 00:00 UTC
CVE 2026-06-03 10:06 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nessus https://www.tenable.com/plugins/nessus/175349 02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

41.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Use After Free CWE-416

Timeline

From disclosure to observed exploitation attempts

  1. 10:06 UTC

    KEV confirmed by CVE

    Exploitation attempts reported by an external source

  2. 09:26 UTC

    Nessus plugin available

    Scanner coverage available

  3. 17:03 UTC

    CVE published

    Vulnerability disclosed publicly

  4. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  5. 22:34 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2023-29336

Sample API response 
{
  "cve_id": "CVE-2023-29336",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.41185,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}