Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-33775

26
FAUCET Score

CVE-2021-33775 is a Remote Code Execution vulnerability affecting Microsoft HEVC Video Extensions. This high-severity flaw, with a CVSS score of 7.8, could allow an unauthenticated attacker to execute arbitrary code on a vulnerable system if a user is tricked into opening a specially crafted file. While there is no known active exploitation, public exploit code, or Metasploit/Nuclei modules, the vulnerability was addressed in Microsoft's July 2021 Patch Tuesday and received limited community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.41531.0CPE matchmatch criteria
cpe:2.3:a:microsoft:hevc_video_extensions:*:*:*:*:*:*:*:*

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
2.18%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0218 is in the 81st 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-Jul/CVE-2021-33775Important

HEVC Video Extensions Remote Code Execution Vulnerability

Jul 13, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-33775
PatchVendor Advisory