Critical ASUSTOR NAS Security Flaw Enables Complete Device Takeover
A critical vulnerability affecting ASUSTOR Network Attached Storage (NAS) devices has been disclosed, which may allow unauthenticated attackers to gain full control of the affected systems.
A critical vulnerability affecting ASUSTOR Network Attached Storage (NAS) devices has been disclosed, which may allow unauthenticated attackers to gain full control of the affected systems.
Identified as CVE-2026-24936 , this flaw has a CVSS v4.0 base score of 9.5. It is found in the ASUSTOR Data Master (ADM) operating system, primarily affecting the process for joining an Active Directory (AD) Domain.
The issue is an improper input validation vulnerability within a specific CGI program. This flaw arises when a particular function is enabled as the NAS attempts to join an AD Domain. Due to inadequate input parameter validation, the system is vulnerable to exploitation.
An unauthenticated remote attacker can exploit this to bypass security controls and write arbitrary data to any file on the system, potentially overwriting critical system files or configuration settings. This can lead to a complete system compromise and grant root-level access to the attacker.
Identified as CVE-2026-24936 , this flaw has a CVSS v4.0 base score of 9.5.
CVE ID: CVE-2026-24936 Severity: Critical CVSS v4.0 Score: 9.5 Vulnerability Type: Improper Input Validation / Arbitrary File Write
The vulnerability impacts two major branches of the ADM software. A patch is available for the ADM 5.x series, resolved in ADM 5.1.2.RE31. Users running ADM 5.0.0 through 5.1.1.RCI1 should upgrade immediately.
For users on the ADM 4.x branch, covering versions 4.1.0 through 4.3.3.ROF1, the status remains "Ongoing." Administrators should monitor ASUSTOR’s security advisories for updates and consider isolating these devices from the internet or disabling AD Domain joining features until a fix is available.
Based on reporting by GBHackers.
