900+ Sangoma FreePBX Instances Compromised in Ongoing Web Shell Attacks

The Shadowserver Foundation has revealed that over 900 Sangoma FreePBX instances still remain infected with web shells as part of attacks that exploited a command injection vulnerability starting in December 2025.
Of these, 401 instances are located in the U.S., followed by 51 in Brazil, 43 in Canada, 40 in Germany, and 36 in France.
The non-profit entity said the compromises are likely