CVE-2021-34812: Synology Calendar

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

Use of hard-coded credentials vulnerability in php component in Synology Calendar before 2.4.0-0761 allows remote attackers to obtain sensitive information via unspecified vectors.

Affected products

• Synology Calendar: before 2.4.0-0761 (fixed in 2.4.0-0761)

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