CVE-2021-39392: Mylittletools Mylittlebackup

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.

Affected products

• Mylittletools Mylittlebackup: up to and including 1.7

Published 2021-09-15. Last modified 2026-06-17.