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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (17.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Asustor Adm — versions 4.1.0, 5.0.0
- Asustor Data Master
Weakness classification (CWE)
References
- www.asustor.com/security/security_advisory_detail (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.