How severe is CVE-2021-28874?

CVE-2021-28874 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28874 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28874?

CVE-2021-28874 affects Serenityos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28874?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-28874 published?

CVE-2021-28874 was published on 2021-04-06 and last updated on 2026-06-17.

CVE-2021-28874

CVE-2021-28874 is a high-severity vulnerability in Serenityos with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Serenityos
Published: 2021-04-06
Last modified: 2026-06-17

Description

SerenityOS fixed as of c9f25bca048443e317f1994ba9b106f2386688c3 contains a buffer overflow vulnerability in LibTextCode through opening a crafted file.

Frequently asked questions

What is CVE-2021-28874?: SerenityOS fixed as of c9f25bca048443e317f1994ba9b106f2386688c3 contains a buffer overflow vulnerability in LibTextCode through opening a crafted file.
How severe is CVE-2021-28874?: CVE-2021-28874 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28874 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28874?: CVE-2021-28874 affects Serenityos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28874?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-28874 published?: CVE-2021-28874 was published on 2021-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:serenityos:serenityos:*:*:*:*:*:*:*:*

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