A stack-based buffer overflow vulnerability was found in the VPN Clients on the ADM. The issue stems from the use of unbounded sscanf() and passing user-controlled data directly to printf(). Due to the lack of PIE and Stack Canary protections, an authenticated remote attacker can exploit these to execute arbitrary code as the web server user. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RR42 as well as from ADM 5.0.0 through ADM 5.1.2.REO1.
Fix
Public exploits 1
- mlgzackfly/CVE-2026-6643 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 1
- https://www.asustor.com/security/security_advisory_detail?id=54 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.6 · asustorNVD modified 2026-10-26 21:10
Affected (CPE criteria) 1
cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:*
References 1
- https://www.asustor.com/security/security_advisory_detail?id=54 Vendor Advisory