CVE-2026-3100: Asustor Data Master

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

The FTP Backup on the ADM will not properly strictly enforce TLS certificate verification while connecting to an FTP server using FTPES/FTPS. An improper validated TLS/SSL certificates allows a remote attacker can intercept network traffic to perform a Man-in-the-Middle (MitM) attack, which may intercept, modify, or obtain sensitive information such as authentication credentials and backup data. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.2.RE51.

Affected products

• Asustor Data Master: from 4.1.0.rhu2, up to and including 4.3.3.rof1; from 5.0.0.ra82, before 5.1.2.reo1 (fixed in 5.1.2.reo1)

Published 2026-02-25. Last modified 2026-06-17.