VULNERABILITY INTELLIGENCE

CVE-2021-25829

CVSS score7.8 HIGH

EPSS probability7.45%

CISA KEVNot currently listed

Published2021-03-01

Last modified2026-06-17

Description

An improper binary stream data handling issue was found in the [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v5.6.3. Using this bug, an attacker is able to produce a denial of service attack that can eventually shut down the target server.