CVE-2026-20230CiscoServers and softwareJune 25, 2026

Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability

High 8.6Actively exploited

Description

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.

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.

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Details

Vendor
Cisco
Product
Cisco Unified Communications Manager
CVE
CVE-2026-20230
Affected versions
Unified CM 14: from 14.0 to before 14SU6 — fixed in 14SU6
Unified CM 15: from 15.0 to 15SU4a (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
8.6
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
June 28, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
June 25, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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