PT-2026-32877 · Microsoft · Windows Win32K+1

Marcin Wiazowski · Published 2026-04-14 · Updated 2026-04-15 · CVE-2026-33104

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Win32K - GRFX (affected versions not specified)

Description A race condition occurs due to improper synchronization when using a shared resource in Windows Win32K - GRFX. This improper locking allows an authorized attacker to elevate privileges locally on the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Race Condition

Weakness Enumeration

CWE-416

CWE-362

Related Identifiers

BDU:2026-05675

CVE-2026-33104

ZDI-26-278

Affected Products

Windows

Windows Win32K

References · 7

• https://zerodayinitiative.com/advisories/ZDI-26-278 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33104 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-33104 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33104 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33104 · Security Note
• https://bdu.fstec.ru/vul/2026-05675 · Security Note
• https://twitter.com/CVEnew/status/2044358560658665934 · Twitter Post