Freeswitch

Freeswitch is an open-source telecommunications platform and soft-switch engine widely deployed in VoIP infrastructure, carrier networks, and unified communications systems, presenting a strategically important but narrowly scoped attack surface. Vulnerabilities affecting the platform skew toward serious outcomes, with a meaningful share reaching critical severity, and recur through memory-safety and authentication-handling weakness classes including improper authentication, input-validation failures, out-of-bounds writes, heap-based buffer overflows, and buffer-boundary violations that are characteristic of a large native codebase handling untrusted protocol data. The exposure concentrates entirely within the core Freeswitch product itself, making patch adoption and deployment segmentation critical for operators relying on this platform. Defenders should monitor this vendor's releases closely and treat critical advisories as high-priority in call-processing tiers; live severity and exploitation counts are shown alongside this summary.