---
id: CVE-2026-58599
title: >-
  Heap-based buffer overflow in Microsoft Windows Codecs Library allows an
  unauthorized attacker to execute code locally.
summary: >-
  Heap-based buffer overflow in Microsoft Windows Codecs Library allows an
  unauthorized attacker to execute code locally.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: Microsoft
product: HEVC Video Extensions
affected:
  - hevc_video_extensions >= 1.0.0 < 2.4.87.0
  - hevc_video_extensions_for_licensed_applications >= 2.0.0.0 < 2.4.85.0
  - hevc_video_extensions_from_device_manufacturer >= 2.0.0.0 < 2.4.86.0
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T17:17:24.497'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58599'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58599'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T15:41:56.589167Z'
epss: 0.00477
epssPercentile: 0.38488
ingestedAt: '2026-09-08T18:07:34.913Z'
---

## Overview

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

## Remediation

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