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CVE-2021-4065

28
FAUCET Score

CVE-2021-4065 is a use-after-free vulnerability in Google Chrome's autofill feature, affecting versions prior to 96.0.4664.93, as well as various Debian and Fedora distributions. This high-severity flaw (CVSS 8.8) allows a remote attacker to potentially exploit heap corruption by enticing a user to visit a crafted HTML page, leading to high impacts on confidentiality, integrity, and availability. While there is no known active exploitation or publicly available exploit code, the vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 96.0.4664.93CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
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
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 64th 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: 96.0.1054.53
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2021-Dec/CVE-2021-4065

Chromium: CVE-2021-4065 Use after free in autofill

Dec 14, 2021

References

chromereleases.googleblog.com / 2021/12/stable-channel-update-for-desktop.html
Release NotesVendor Advisory
crbug.com / 1273674
Permissions Required
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744
security.gentoo.org / glsa/202208-25
Third Party Advisory
debian.org / security/2022/dsa-5046
Third Party Advisory