PT-2026-2687 · Microsoft · Windows

K3Vinlusec + 1 · Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20837

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 Media (affected versions not specified)

Description A heap-based buffer overflow exists in Windows Media that could allow an unauthorized attacker to execute code locally. Remote attackers may be able to execute arbitrary code and affect the system.

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

BDU:2026-00533

CVE-2026-20837

Affected Products

Windows

References · 8

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20837 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-20837 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20837 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20837 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20837 · Security Note
• https://bdu.fstec.ru/vul/2026-00533 · Security Note
• https://twitter.com/vuldb/status/2011147033105821882 · Twitter Post
• https://twitter.com/CVEnew/status/2011759678116552850 · Twitter Post