CVE-2026-108400: HEVC Video Extensions Remote Code Execution Vulnerability
Integer overflow or wraparound in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.
- Published by source
- 2026-10-13
- First seen by Reality Radar
- 2026-10-22
- Last verified
- 2026-10-22
Affected
- Manufacturer
- Microsoft
- Products
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 HEVC Video Extensions from Device Manufacturer on Windows Server 2025 HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 HEVC Video Extensions from Device Manufacturer on Windows Server 2022 HEVC Video Extensions from Device Manufacturer on Windows Server 2019 HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 HEVC Video Extensions for Licensed Applications HEVC Video Extensions
- CPE
- cpe:2.3:a:microsoft:hevc_video_extensions_from_device_manufacturer:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:hevc_video_extensions_for_licensed_appplications:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:hevc_video_extensions:*:*:*:*:*:*:*:*
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: Critical — Remote Code Execution
Remedy / actions:
- Install the latest Microsoft security update
Is this affecting you?
Add what you own or use and Reality Radar will tell you when official changes match it — with evidence and next steps.
Sources
- Microsoft Security Update Guide (MSRC) Tier A · official published 2026-10-13
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #114 | new | 2026-10-22 | 1addafdcc0ac…46525b | 8967de26ded9…032af7 |
Chain head: #1076 8ad5adc30b9b…88ce20