How severe is CVE-2026-24881?

CVE-2026-24881 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-24881 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24881?

CVE-2026-24881 primarily affects Gnupg. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-24881?

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-2026-24881 have an EU (EUVD) identifier?

Yes. CVE-2026-24881 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4768.

When was CVE-2026-24881 published?

CVE-2026-24881 was published on 2026-01-27 and last updated on 2026-06-30.

CVE-2026-24881

CVE-2026-24881 is a high-severity vulnerability in Gnupg with a CVSS 3.x base score of 8.1. 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-121.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4768
Weakness: CWE-121
Affected product: Gnupg
Published: 2026-01-27
Last modified: 2026-06-30

Description

In GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflow in gpg-agent during PKDECRYPT--kem=CMS handling. This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution.

Frequently asked questions

What is CVE-2026-24881?: In GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflow in gpg-agent during PKDECRYPT--kem=CMS handling. This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution.
How severe is CVE-2026-24881?: CVE-2026-24881 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-24881 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24881?: CVE-2026-24881 primarily affects Gnupg. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-24881?: 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-2026-24881 have an EU (EUVD) identifier?: Yes. CVE-2026-24881 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4768.
When was CVE-2026-24881 published?: CVE-2026-24881 was published on 2026-01-27 and last updated on 2026-06-30.

References

Affected products (2)

cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*
cpe:2.3:a:gpg4win:gpg4win:*:*:*:*:*:*:*:*

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