CVE-2026-58599CriticalMicrosoft CVSS 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-58599 — HEVC Video Extensions

Published
September 11, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-58599 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58599. This page also shows what EchelonGraph holds for CVE-2026-58599, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products24

  • HEVC Video Extensions
  • HEVC Video Extensions for Licensed Applications
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for 32-bit Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for 32-bit Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2019
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2019 (Server Core installation)
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2022
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2022 (Server Core installation)
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2025
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation)

✅ Updates Microsoft lists: 4 updates

4 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update2.4.87.0
—Security Update2.4.85.0
—Security Update2.4.86.0
—Security Update2.5.25.0

🧭 EchelonGraph on CVE-2026-58599

EchelonGraph score
7.8 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

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

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-58599, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (4)