CVE-2021-40387: Kaseya Unitrends Backup Software

High severity, CVSS 8.8. EPSS: 2.4% chance of exploitation in the next 30 days.

An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5-2. There is authenticated remote code execution.

Affected products

• Kaseya Unitrends Backup Software: before 10.5.5-2 (fixed in 10.5.5-2)

Published 2021-09-01. Last modified 2026-06-17.