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CVE-2026-6643

CRITICAL
9.9NVD

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.

CVSS v3.1 Score

9.9
/ 10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Information

Published
20 avr. 2026
Updated
22 avr. 2026
Status
Analyzed
Source
security@asustor.com

Affected products

asustor data master
Versions : 4.3.3.RR42, 5.1.2.reo1

Weaknesses (CWE)

CWE-121

Similar CVEs

Other vulnerabilities of type CWE-121

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