Microsoft Windows Codecs Library
CVE-2026-108400 — HEVC Video Extensions Remote Code Execution Vulnerability
Executive Summary
Integer overflow or wraparound in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.
Overview
8.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.7
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
24 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| HEVC Video Extensions | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions for Licensed Applications | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for 32-bit Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for ARM64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for 32-bit Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for ARM64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for ARM64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for ARM64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for ARM64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2019 | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2019 (Server Core installation) | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2022 | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2022 (Server Core installation) | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2025 | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation) | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
Release Notes |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Anonymous
Taewoo (Tae_ω02)
References
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