We have become aware of a possible exploit of the Vigor3900 / 2960 / 300B related to functions and services found on 4th May, 2020, and this vulnerability had been resolved with the firmware v1.5.1.1 released on 17th Jun. 2020.

Necessary Action: Users of affected models should upgrade firmware to version 1.5.1.1 or later as soon as possible.

Affected Products and the Fixed Firmware Version

Model	Fixed Firmware Version	Download Link
Vigor300B	1.5.1.1
Vigor2960	1.5.1.1
Vigor3900	1.5.1.1

The issue only affects the Vigor3900 / 2960 / 300B and is not known to affect any other DrayTek products.