CVE-2021-27049 is a Remote Code Execution vulnerability affecting Microsoft HEVC Video Extensions. With a CVSS score of 7.8 (HIGH), it allows an unauthenticated attacker to execute arbitrary code on a vulnerable system if a user is tricked into opening a specially crafted file. While the vulnerability has a high potential impact (confidentiality, integrity, and availability), there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog. Community discussion and media coverage are minimal, with only one article from BleepingComputer mentioning its fix in a Patch Tuesday update.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:microsoft:high_efficiency_video_coding:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.