CVE-2021-20630: Cybozu Office

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Improper access control vulnerability in Phone Messages of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attackers to bypass access restriction and obtain the data of Phone Messages 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.