CVE-2019-11829: Synology Calendar

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

OS command injection vulnerability in drivers_syno_import_user.php in Synology Calendar before 2.3.1-0617 allows remote attackers to execute arbitrary commands via the crafted 'X-Real-IP' header.

Affected products

• Synology Calendar: before 2.3.1-0617 (fixed in 2.3.1-0617)

Published 2019-06-30. Last modified 2026-06-17.