Source: CISA Known Exploited Vulnerabilities

CVE-2026-20230: Cisco Unified Communications Manager

By CISA Known Exploited Vulnerabilities1 min readJune 25, 2026

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20230

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Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) contain a server-side request forgery (SSRF) Vulnerability that could allow an unauthenticated, remote attacker to write files to the underlying operating system that could be used later to elevate to root. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Take this read into the canonical ecosystem surfaces

Take this read into the canonical ecosystem surfaces

CVE-2026-20230: Cisco Unified Communications Manager