CVE-2021-20631: Cybozu Office

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Improper input validation vulnerability in Custom App of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attacker to alter the data of Custom App via unspecified vectors.

Affected products

• Cybozu Office: from 10.0.0, up to and including 10.8.4

Published 2021-03-18. Last modified 2026-06-17.