How severe is CVE-2025-13151?

CVE-2025-13151 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-13151 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-13151?

CVE-2025-13151 affects Gnu Libtasn1. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-13151?

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.

Does CVE-2025-13151 have an EU (EUVD) identifier?

Yes. CVE-2025-13151 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206262.

When was CVE-2025-13151 published?

CVE-2025-13151 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2025-13151

CVE-2025-13151 is a high-severity vulnerability in Gnu Libtasn1 with a CVSS 3.x base score of 7.5. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206262
Weakness: CWE-787
Affected product: Gnu Libtasn1
Published: 2026-01-07
Last modified: 2026-06-17

Description

Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string.

Frequently asked questions

What is CVE-2025-13151?: Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string.
How severe is CVE-2025-13151?: CVE-2025-13151 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-13151 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-13151?: CVE-2025-13151 affects Gnu Libtasn1. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-13151?: 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.
Does CVE-2025-13151 have an EU (EUVD) identifier?: Yes. CVE-2025-13151 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206262.
When was CVE-2025-13151 published?: CVE-2025-13151 was published on 2026-01-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gnu:libtasn1:4.20.0:*:*:*:*:*:*:*

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