CVE-2023-29336
HighExploitedPublic exploitWin32k Elevation of Privilege Vulnerability
Published May 9, 2023 · Updated Oct 28, 2025
Key Facts
Patch immediately- CVE-2023-29336 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 10 1507 (Microsoft), Windows 10 1607 (Microsoft), Windows Server 2008 (Microsoft) and 12 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 9, 2023. Public exploit code is available.
- EPSS estimates a 41% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows 10 1507 10.0.10240.19926, Windows 10 1607 10.0.14393.5921, Windows 10 Version 1507 10.0.10240.19926.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
41%
Higher than 98.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-29336 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Win32k Elevation of Privilege Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 9, 2023 | May 30, 2023 | Not reported |
| Industry KEV feed | May 9, 2023 | May 30, 2023 | Not reported |
| CIRCL KEV | May 9, 2023 | May 30, 2023 | Not reported |
| ENISA EUVD | May 9, 2023 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
20 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1507Microsoft | See advisory | 10.0.10240.19926 |
| Windows 10 1607Microsoft | See advisory | 10.0.14393.5921 |
| Windows Server 2008Microsoft | r2-sp1 | n/a |
| Windows Server 2012Microsoft | r2, >= 6.2.9200.0 | 6.2.9200.24266 |
| Windows Server 2016Microsoft | >= 10.0.14393.0 | 10.0.14393.5921 |
Patched Releases
Windows 10 1507
10.0.10240.19926
Windows 10 1607
10.0.14393.5921
Windows 10 Version 1507
10.0.10240.19926
Windows 10 Version 1607
10.0.14393.5921
Windows Server 2008 Service Pack 2
6.0.6003.22070
Windows Server 2008 R2 Service Pack 1
6.1.7601.26519
Windows Server 2008 R2 Service Pack 1 (Server Core installation)
6.1.7601.26519
Windows Server 2008 Service Pack 2 (Server Core installation)
6.0.6003.22070
Windows Server 2012
6.2.9200.24266
Windows Server 2012 (Server Core installation)
6.2.9200.24266
Windows Server 2012 R2
6.3.9600.20969
Windows Server 2012 R2 (Server Core installation)
6.3.9600.20969
Windows Server 2016
10.0.14393.5921
Windows Server 2016 (Server Core installation)
10.0.14393.5921
Timeline
Publicly disclosed
May 9, 2023
Added to CISA KEV
May 9, 2023
Added to Industry KEV feed
May 9, 2023
Added to CIRCL KEV
May 9, 2023
Added to ENISA EUVD
May 9, 2023
Last updated
Oct 28, 2025
Weakness Type
- CWE-416 Use After Free
References
- patchWin32k Elevation of Privilege Vulnerability
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Win32k Elevation of Privilege Vulnerability
Affected: Windows 10 1507 (Microsoft); Windows 10 1607 (Microsoft); Windows Server 2008 (Microsoft) versions r2-sp1, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 9, 2023.
Yes. It was added on May 9, 2023 with a federal remediation due date of May 30, 2023.
Public exploit code is available.
Fixed versions are available, including Windows 10 1507 10.0.10240.19926, Windows 10 1607 10.0.14393.5921, Windows 10 Version 1507 10.0.10240.19926.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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