Vulnerability in Asustor Data Master
CVE-2026-18186
A stored format string vulnerability was found in the FTP Backup on the ADM. The vulnerability occurs because user-controlled backup configuration data may be written into a task log and later processed through an unsafe format string operation. An authenticated attacker can exploit this issue to disclose memory information or cause denial of service of the affected CGI process. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RUN1 as well as from ADM 5.0.0 through ADM 5.1.3.RI81.
EPSS: 0.003 (18.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Asustor Data_master
- Asustor Inc. Adm — versions 5.0.0, 4.1.0
Weakness classification (CWE)
References
- security@asustor.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18186?
- CVE-2026-18186 is a high-severity vulnerability in Asustor Data Master, classified under Use of Externally-Controlled Format String. CVSS score: 8.1/10. Published 2026-07-30.
- How severe is CVE-2026-18186?
- High severity. CVSS v3 base score is 8.1 out of 10.