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CVE-2020-6554

21
FAUCET Score

CVE-2020-6554 is a high-severity use-after-free vulnerability in Google Chrome versions prior to 84.0.4147.125, affecting various distributions including Debian and Fedora. This flaw allows a remote attacker to potentially achieve a sandbox escape through a specially crafted Chrome Extension. With a CVSS score of 8.6, exploitation requires user interaction (UI:R) but has low attack complexity (AC:L), leading to high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). While there is no known public exploit code (Metasploit, Nuclei, ExploitDB) and it's not in CISA's KEV catalog, the vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential interest from threat actors.

Impacted Technologies

VendorProductVersion(s)CPE
< 84.0.4147.125CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 44th percentile among its peer group of 11,621 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, 0.1 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 (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: chromium-browser-0:84.0.4147.135-1.el6_10
View patch
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-6554Moderate

chromium-browser: Use after free in extensions

Aug 10, 2020

References

chromereleases.googleblog.com / 2020/08/stable-channel-update-for-desktop.html
Vendor Advisory
crbug.com / 1094235
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/EE7XWIZBME7JAY7N6CGPET4CLNHHEIVT
debian.org / security/2021/dsa-4824
Third Party Advisory