---
id: CVE-2026-70343
title: >-
  Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an
  unauthorized attacker to execute code over a network.
summary: >-
  Heap-based buffer overflow in Microsoft MPEG-2 Video Extension 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
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:18:18.783'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70343'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70343'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-13T19:43:29.052Z'
vendor: Microsoft
product: MPEG-2 Video Extension
affected:
  - mpeg-2_video_extension >= 1.0.0.0 < 1.2.32.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-13T20:43:03.265299Z'
epss: 0.00912
epssPercentile: 0.59834
---

## Overview

Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.