DrayTek pre-auth RCE

Remote execution is possible for DrayTek devices of versions Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta . The remote code execution is done through shell metacharacters into the cgi-bin/mainfunction.cgi URI. This vulnerability has been fixed in Vigor3900/2960/300B v1.5.1.

Mitigation / Precaution

In order to patch this vulnerability, please install the official patch DrayTek made available for supported, vulnerable instances.

Written by

Anandhu Krishnan

Lead Engineer

Anandhu is an accomplished Senior Lead Engineer with a strong focus on back-end development. His expertise lies in architecting and optimizing the core of software applications to ensure they run smoothly and efficiently. With a meticulous attention to detail and a deep understanding of data management and server-side operations, Anandhu has been a driving force behind the success of various back-end projects.