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CVE-2021-4079

22
FAUCET Score

CVE-2021-4079 describes an out-of-bounds write vulnerability in Google Chrome's WebRTC component, affecting versions prior to 96.0.4664.93, as well as Debian-based Chrome installations. This high-severity flaw (CVSS 8.8) could allow a remote unauthenticated attacker to exploit heap corruption via specially crafted WebRTC packets, potentially leading to high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation is reported, the vulnerability has garnered some community discussion and media coverage, indicating awareness of its potential.

Impacted Technologies

VendorProductVersion(s)CPE
< 96.0.4664.93CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0085 is in the 56th percentile among its peer group of 14,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 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 0.1 Security Researcher mentions.

Remediation

Vendor Patches (1)

googlevendor investigatingvia nvd_reference
View patch

References

chromereleases.googleblog.com / 2021/12/stable-channel-update-for-desktop.html
Release NotesVendor Advisory
crbug.com / 1265806
Permissions Required
security.gentoo.org / glsa/202208-25
Third Party Advisory
debian.org / security/2022/dsa-5046
Third Party Advisory