---
id: CVE-2026-81352
title: >-
  Heap-based buffer overflow in Microsoft Windows Codecs Library allows an
  unauthorized attacker to execute code over a network.
summary: >-
  Heap-based buffer overflow in Microsoft Windows Codecs Library allows an
  unauthorized attacker to execute code over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: microsoft
product: web_media_extensions
affected:
  - web_media_extensions < 1.2.42.0
  - web_media_extensions < 2.1.51.0
patched:
  - web_media_extensions 2.1.51.0
published: '2026-09-08'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T15:39:40.480'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81352'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81352'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.0048
epssPercentile: 0.38791
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T04:26:56.381369Z'
ingestedAt: '2026-09-08T19:08:49.631Z'
---

## Overview

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

## Affected

- `web_media_extensions < 1.2.42.0`
- `web_media_extensions < 2.1.51.0`

## Remediation

Upgrade past the affected range:

- `web_media_extensions 2.1.51.0`