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CVE-2021-28874

25
FAUCET Score

CVE-2021-28874 is a high-severity buffer overflow vulnerability (CVSS 7.8) affecting SerenityOS, specifically in its LibTextCode component. This flaw allows an attacker to achieve high confidentiality, integrity, and availability impacts by tricking a user into opening a specially crafted file. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the vulnerability has been patched in SerenityOS as of commit c9f25bca048443e317f1994ba9b106f2386688c3.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-03-15CPE matchmatch criteria
cpe:2.3:o:serenityos:serenityos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 58th percentile among its peer group of 11,616 CVEs.

Social Chatter

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

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / SerenityOS/serenity/commit/c9f25bca048443e317f1994ba9b106f2386688c3
Third Party Advisory
github.com / SerenityOS/serenity/issues/5769
Third Party Advisory
github.com / SerenityOS/serenity/pull/5802
Third Party Advisory