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Cisco patches SSRF flaw in Unified CM enabling root access

vulnerabilityopenJun 4, 2026 — Jun 5, 2026

CVE-2026-20230 is a critical unauthenticated SSRF vulnerability affecting Cisco Unified CM and SME. This flaw can lead to root-level compromise when the WebDialer service is enabled, which is disabled by default. Exploitation involves sending a crafted HTTP request that manipulates the server, allowing the attacker to write files and potentially elevate…

CVE-2026-20230 8.6
Root sourcesec.cloudapps.cisco.com
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