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CVE-2021-30599

30
FAUCET Score

CVE-2021-30599 is a type confusion vulnerability in the V8 JavaScript engine of Google Chrome, affecting versions prior to 92.0.4515.159, as well as Fedora Project's Chrome and Fedora. This high-severity flaw (CVSS 8.8) allows a remote attacker to execute arbitrary code within the browser's sandbox by enticing a user to visit a specially crafted HTML page. While not currently listed on the KEV catalog or having public exploit code in Metasploit or ExploitDB, the vulnerability has garnered significant community discussion and media coverage, indicating notable attention from security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 92.0.4515.159CPE match
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

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
5.42%
Probability of exploitation in next 30 days
EPSS Percentile
91.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0542 is in the 92nd 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: 92.0.902.78
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2021-Aug/CVE-2021-30599

Chromium: CVE-2021-30599 Type Confusion in V8

Aug 10, 2021

References

chromereleases.googleblog.com / 2021/08/stable-channel-update-for-desktop.html
Release NotesVendor Advisory
crbug.com / 1234770
Permissions RequiredVendor Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5LVY4WIWTVVYKQMROJJS365TZBKEARCF
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/IPJPUSAWIJMQFBQQQYXAICLI4EKFQOH6
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/QW4R2K5HVJ4R6XDZYOJCCFPIN2XHNS3L