PT-2026-40155 · Microsoft · Windows Dwm Core Library+1

Published 2026-02-19 · Updated 2026-05-22 · CVE-2026-34336

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows DWM Core Library (affected versions not specified)

Description A buffer over-read in the Windows DWM Core Library allows an authorized attacker to disclose sensitive information locally.

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

Buffer Over-read

Heap Based Buffer Overflow

Weakness Enumeration

CWE-126

CWE-122

Related Identifiers

BDU:2026-02245

CVE-2026-34336

Affected Products

Windows

Windows Dwm Core Library

References · 8

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34336 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02245 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34336 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34336 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-34336 · Vendor Advisory
• https://twitter.com/f1tym1/status/2055186302635532426 · Twitter Post
• https://t.me/cveNotify/164662 · Telegram Post
• https://feedly.com/cve/CVE-2026-34336 · Note