PT-2026-47920 · Microsoft · Win32K

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-44803

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description An integer overflow or wraparound occurs in Windows Win32K - GRFX, which allows an unauthorized attacker to execute arbitrary code locally or remotely, potentially affecting the entire system.

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

RCE

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-44803

Affected Products

Win32K

References · 4

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44803 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-44803 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-44803 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-44803 · Security Note