What’s Vulnerable › Vulnerabilities
CVE-2026-6643: A stack-based buffer overflow vulnerability in the VPN Clients on the ADM
- Severity: critical (CVSS 9.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-20 · updated 2026-10-26
- Weakness: CWE-121
Description
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.
Affected products
- Tenable ASUSTOR Data Master: from 4.1.0.rhu2 before 4.3.3.RR42; from 5.0.0.ra82 before 5.1.2.reo1 — fixed in 4.3.3.RR42, 5.1.2.reo1
How to fix
Upgrade to a fixed version: Tenable ASUSTOR Data Master 4.3.3.RR42, 5.1.2.reo1. Check the vendor advisory for mitigations.
References
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