CVE-2026-81352

Published: Sep 8, 2026Modified: Sep 30, 2026

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

Description

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

Affected (2)

Products: Microsoft: Web Media Extensions

1 product

Web Media Extensions

Configuration A

1 vulnerable · 6 platform

Vulnerable Software	Affected Versions
Microsoft Web Media Extensions	version < 1.2.42.0

Running on/with	Platform Versions
Microsoft Windows 10 21h2	version < 10.0.19044.7725
Microsoft Windows 10 21h2	version < 10.0.19044.7725
Microsoft Windows 10 21h2	version < 10.0.19044.7725
Microsoft Windows 10 22h2	version < 10.0.19045.7725
Microsoft Windows 10 22h2	version < 10.0.19045.7725
Microsoft Windows 10 22h2	version < 10.0.19045.7725

Configuration B

1 vulnerable · 8 platform

Vulnerable Software	Affected Versions
Microsoft Web Media Extensions	version < 2.1.51.0

Running on/with	Platform Versions
Microsoft Windows 11 23h2	All versions
Microsoft Windows 11 23h2	All versions
Microsoft Windows 11 24h2	All versions
Microsoft Windows 11 24h2	All versions
Microsoft Windows 11 25h2	All versions
Microsoft Windows 11 25h2	All versions
Microsoft Windows 11 26h1	All versions
Microsoft Windows 11 26h1	All versions

Related CWEs

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81352

Source: secure@microsoft.com

PatchVendor Advisory

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