Security Fix: Firmware for UCM6510 is released as official



Dear Grandstream Customers,

Firmware for UCM6510 is released as official. Here is the link for the release notes:

This firmware contains important security fix. Please upgrade your UCM6510 to immediately for security purpose. Here is the security bulletin:

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.



Guys, there is a typo in the bulletin. It says to upgrade the firmware to instead of


Suggest as absolute priority the arrangement of the rules in “Outbound Blacklist”, to date the destinations are incorrect, do not comply with the E164 protocol and are useless,
would work and the installers would apply them, would be an ad hoc behavior, and would avoid what happened in recent days in the UCM fraudulent (regardless of whether the rules in ACL must be ALWAYS activated).