CVE-2025-2866

2.4 lowEPSS 0.1%

Low (2.4) in libreoffice libreoffice. EPSS 0.1% chance of exploitation in the next 30 days.

Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by Improper Validation. In the affected versions of LibreOffice a flaw in the verification code for adbe.pkcs7.sha1 signatures could cause invalid signatures to be accepted as valid This issue affects LibreOffice: from 24.8 before < 24.8.6, from 25.2 before < 25.2.2.

Severity

CVSS 4.0

2.4 low

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS 3.1

5.5 medium

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-31)
CWE: CWE-347
Published: 2025-04-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

libreoffice:libreoffice

References

https://www.libreoffice.org/about-us/security/advisories/cve-2025-2866
https://lists.debian.org/debian-lts-announce/2025/06/msg00002.html

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