Yealink SIP-T46U v108.86.0.118 hit by HIGH-severity stack-based buffer overflow (CVE-2026-12222). Exploitable via local network — no patch, vendor unresponsive. Restrict access & monitor. https://radar.offseq.com/threat/cve-2026-12222-stack-based-buffer-overflow-in-yeal-f1394c98 #OffSeq #Yealink #VoIP #Vuln