Microsoft Windows Codecs Library
CVE-2021-1643 — HEVC Video Extensions Remote Code Execution Vulnerability
Executive Summary
None
Overview
7.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
Temporal Score: 7.0
EPSS Score
0.03889
probability of exploitation in the next 30 days
0.88877 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
1 affected product
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| HEVC Video Extensions | — |
Critical | Remote Code Execution | Unknown |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
— |
Unknown |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Le Huu Quang Linh (@linhlhq) from Vietnam National Cyber Security Center (NCSC Vietnam), FireEye Inc
References
On This Page