PT-2026-58239 · Microsoft · Windows Media Foundation

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-54993

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 Microsoft Windows Media Foundation (affected versions not specified)

Description A heap-based buffer overflow exists in Microsoft Windows Media Foundation. This issue allows an unauthorized attacker to execute code locally or achieve remote code execution by tricking a user into opening a malicious media file.

Recommendations Install the July 2026 Windows updates.

Fix

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-54993

Affected Products

Windows Media Foundation

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54993 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-54993 · Security Note
• https://twitter.com/windowsforum/status/2077146910419263558 · Twitter Post