This vulnerability in DrayTek VigorSwitch G2540xs involves improper neutralization of special elements used in OS commands within the commandTable function. Specifically, dangerous characters such as backticks, newline characters, and single quotes are not fully filtered in a parameter field. An attacker who has valid administrative credentials can exploit this flaw by submitting crafted input through the device's web management interface, resulting in arbitrary command execution with root privileges. The CVSS 4.0 base score is 8.6, reflecting network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability.

Successful exploitation allows an attacker with administrative access to execute arbitrary OS commands as root on the affected device. This can lead to full compromise of the device, including unauthorized control, data manipulation, or disruption of network operations managed by the switch.

No official patch or remediation guidance is currently available from the vendor. Administrators should monitor the vendor advisory for updates. Since exploitation requires valid administrative credentials, it is critical to restrict and secure access to the device's web management interface. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.