A security vulnerability has recently been discovered in the UCM series IP PBX firmware version 220.127.116.11 or older. We highly recommend that any UCM customer upgrade their firmware version to 18.104.22.168 or 22.214.171.124 as soon as possible in order to install a permanent fix to this issue.
The security vulnerability affects the UCM6100 series, UCM6200 series and UCM6510. For more information on the details behind the security issue please read the special security bulletin below.
To upgrade your firmware, please visit the firmware page below and install either 126.96.36.199 (official release) or 188.8.131.52 (currently a beta release).
If you are not familiar with how to upgrade the firmware, please see below for a link to each UCM series user manual:
UCM6100 User Manual - page 349
UCM6200 User Manual - page 336
UCM6510 User Manual - page 364
For additional support resources please see the options below. If you are opening a Help Desk ticket please be sure to log in with your ResellerConnect credentials to receive priority technical support.