Vulnerability in Asustor Adm
CVE-2026-3100
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.
Vulnerability class: Improper Certificate Validation
EPSS: 0.002 (7.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Asustor Adm — versions 4.1.0, 5.0.0
- Asustor Data_master
Weakness classification (CWE)
References
- security@asustor.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-3100?
- CVE-2026-3100 is a medium-severity vulnerability in Asustor Adm, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2026-02-25.
- How severe is CVE-2026-3100?
- Medium severity. CVSS v3 base score is 6.5 out of 10.