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CVE-2021-24089

27
FAUCET Score

CVE-2021-24089 is a remote code execution vulnerability affecting Microsoft's HEVC Video Extensions. With a CVSS score of 7.8 (High), successful exploitation requires user interaction (UI:R) and could lead to complete compromise of confidentiality, integrity, and availability (C:H/I:H/A:H) on the affected system. While no public exploit code or active exploitation has been observed, the vulnerability was addressed in Microsoft's March 2021 Patch Tuesday, indicating its significance. Community discussion and media coverage are limited, suggesting it has not garnered widespread attention.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:high_efficiency_video_coding:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.90%
Probability of exploitation in next 30 days
EPSS Percentile
89.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0390 is in the 90th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

microsoft2021-Mar/CVE-2021-24089Critical

HEVC Video Extensions Remote Code Execution Vulnerability

Mar 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-24089
PatchVendor Advisory