CVE-2026-81352: Microsoft Web Media Extensions

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Web Media Extensions: before 1.2.42.0 (fixed in 1.2.42.0); before 2.1.51.0 (fixed in 2.1.51.0)

Published 2026-09-08. Last modified 2026-09-30.