Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since June 25, 2026.
CVE-2026-20230
Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability
Cisco · Unified Communications Manager
Published July 21, 2026
What happened
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 it means for your business
Cisco Unified Communications Manager is listed in CISA's Known Exploited Vulnerabilities catalog (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 remediation due date: 2026-06-28. PremierePC tracks KEV alerts for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Required action
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.
CISA due date: June 28, 2026
Sources
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