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CVE-2021-4098

25
FAUCET Score

CVE-2021-4098 describes an insufficient data validation vulnerability in Mojo within Google Chrome versions prior to 96.0.4664.110. This flaw could allow a remote attacker, after compromising the renderer process, to achieve a sandbox escape through a specially crafted HTML page. Rated with a CVSS score of 7.4 (High), the vulnerability requires user interaction and has a high impact on integrity. While there is no evidence of active exploitation (not in KEV) and no public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness of its potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
< 96.0.4664.110CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.65%
Probability of exploitation in next 30 days
EPSS Percentile
47.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0065 is in the 49th percentile among its peer group of 14,875 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Microsoft Edge (Chromium-based)Fixed in: 96.0.1054.57
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2021-Dec/CVE-2021-4098

Chromium: CVE-2021-4098 Insufficient data validation in Mojo

Dec 14, 2021

References

chromereleases.googleblog.com / 2021/12/stable-channel-update-for-desktop_13.html
Release NotesVendor Advisory
crbug.com / 1263457
Permissions RequiredVendor Advisory