PT-2026-40182 · Microsoft · Windows

Published 2026-05-12 · Updated 2026-05-13 · CVE-2026-35421

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 (affected versions not specified)

Description A heap-based buffer overflow in the Windows GDI (Graphics Device Interface), which is the graphics subsystem of Windows, allows an unauthorized attacker to execute code locally.

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

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-35421

Affected Products

Windows

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-35421 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-35421 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-35421 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35421 · Vendor Advisory
• https://t.me/true_secator/8196 · Telegram Post
• https://reddit.com/r/u_all-in-one-wisper/comments/1tbytog/daily_wisper_report_patch_tuesday_may_12_2026 · Reddit Post
• https://twitter.com/windowsforum/status/2054273680989999286 · Twitter Post
• https://reddit.com/r/pwnhub/comments/1tbxq59/microsofts_may_2026_patch_tuesday_addresses_137 · Reddit Post