Security Fix: Please Upgrade UCM6102/6104/6108/6116 to New Official Firmware Immediately



Dear Grandstream Customers,

Firmware for UCM6102/6104/6108/6116 is released as official. Here is the link for the release notes:

This firmware contains important security fix. Please upgrade your UCM61xx to immediately for security purpose. Here is the security bulletin:

After upgrading, please make sure to change web access passwords for ALL users in UCM web UI->Maintenance->User Management page, which includes super admin, admin and consumer users. It’s also highly recommended to change the username to be different from the previous username. If any unknown user exists in User Management page, please remove it immediately.

The firmware information and release notes can be downloaded from:

Please contact us should you have any issues. Thank you for your support for Grandstream products.

Technical Support
Grandstream Networks, Inc.



Hi, We just updated UCM6104V1.6A to after reboot we can no longer login.
we get message: "wrong username or password. You have 27 more attempts.
we have 2 admin accounts both having the same issue.
no matter how many time we try to login we still get message: 27 more attempts.


direct link:


,For me also same problem, after upgrade to upgrade-ucm6102-6104-6108-6116-to-new-official-firmware-1-0-18-18-immediately/415username and password Wrong,
please we need solution for this problem,
any one have issues???


Did you find any solutions ?


you are on a forum, you cannot create a post and after 1 hour ask, nobody is paid to do it, you can ask questions and ask for advice, and wait.
You can always open a ticket on:

If you want you can write here details and description of the problem, someone will help you when they can.


I have the same issue and I opened a ticket after looking here for an answer…
It’s unfortunate that Grandstream couldn’t get back with an answer in over a month


So, is this firmware okay to use or not?