Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability (CVE-2026-20230)
Severity: high · Patch status: unknown · Since 2026-06-25 · CVE-2026-20230
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. CISA added CVE-2026-20230 to its Known Exploited Vulnerabilities catalog on Jun 25, 2026, which means attackers are exploiting it in the wild.
What to do
- 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.
- US federal agencies must remediate by Jun 28, 2026 (BOD 22-01); treat that as the outer limit.
Sources
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