Cisco Unified CM flaw actively exploited to drop webshells (CVE-2026-20230)

CVE-2026-20230, a server-side request forgery (SSRF) vulnerability affecting Cisco’s Unified Communications Manager (Unified CM), is being exploited to drop webshells and achieve remote code execution capability on the underlying server. “Our honeypots are seeing automated sweeps dropping webshells, all via Tor,” threat intelligence firm Defused warned today, after observing initial attacks over the weekend. The vulnerability Cisco Unified Communications Manager is an enterprise-grade IP telepho