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CVE-2021-27062

26
FAUCET Score

CVE-2021-27062 is a Remote Code Execution vulnerability affecting Microsoft HEVC Video Extensions. With a CVSS score of 7.8 (HIGH), it requires user interaction (UI:R) and local access (AV:L), but once exploited, it can lead to complete compromise of confidentiality, integrity, and availability (C:H/I:H/A:H). There is no known public exploit code (Metasploit, Nuclei, ExploitDB) and it is not listed in CISA's KEV catalog, indicating no active exploitation. Community discussion and media coverage are minimal, suggesting low public awareness despite its potential impact.

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
2.31%
Probability of exploitation in next 30 days
EPSS Percentile
81.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0231 is in the 82nd percentile among its peer group of 11,617 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-2021-27062Important

HEVC Video Extensions Remote Code Execution Vulnerability

Mar 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-27062
PatchVendor Advisory