PT-2026-47920 · Microsoft · Win32K+1

Labyhw + 2 · CVE-2026-44803 · Published 2026-06-09 · Updated 2026-07-12

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 exists in the Windows Graphics Component. This issue allows an unauthorized attacker to execute arbitrary code locally or remotely, potentially affecting the system. The flaw can be triggered using a specially crafted file.

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

DoS

RCE

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

BDU:2026-08199

CVE-2026-44803

Affected Products

Win32K

Windows

References · 10

• 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://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44803 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-44803 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/733226 · Security Note
• https://bdu.fstec.ru/vul/2026-08199 · Security Note
• https://zerodayinitiative.com/blog/2026/6/9/the-june-2026-security-update-review · Note
• https://t.me/cveNotify/171198 · Telegram Post
• https://twitter.com/cyber_advising/status/2076358432550961202 · Twitter Post
• https://t.me/cveNotify/168952 · Telegram Post