AUGUST 4, 2026
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Case File

CVE-2021-25635

MEDIUM · CVSS 5.5 EPSS 0.14%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-03-21 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.5. It affects Office.

CVE
CVE-2021-25635
Severity
MEDIUM
CVSS
5.5
EPSS
0.14%
Office

Original NVD Description

An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to self sign an ODF document, with a signature untrusted by the target, then modify it to change the signature algorithm to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.

Related CVEs

Other vulnerabilities affecting the same vendor(s)