CiscoAnalysisCisco patches cross-site scripting flaw in Unified Communications Manager
What happened.Cisco published security advisory cisco-sa-cucm-xss-5mQn2U5z addressing a cross-site scripting vulnerability in Cisco Unified Communications Manager.
Why it matters.Unified communications platforms orchestrate telephony, call routing, and enterprise collaboration backbones across corporate environments. When management portals fail to sanitize user input, attackers weaponize administrative sessions to harvest session tokens and compromise telephony gateways. Telecom engineering teams must apply Cisco maintenance updates across all Unified CM deployments. Security administrators should restrict administrative access to isolated management networks.
The technical specifications:
- Vulnerability mechanics: Tracked as CVE-2026-76419 with a CVSS score of 6.1, improper input validation in the web interface permits cross-site scripting.
- Attack vector: Unauthenticated remote attackers can trick administrative interface users into clicking crafted malicious links during active management sessions.
- Exploitation impact: Successful attacks allow adversaries to execute arbitrary script code within administrative browser sessions or steal sensitive credentials.
- Affected software: The vulnerability affects Cisco Unified Communications Manager and Unified CM Session Management Edition releases 14 and 15.
- Remediation guidance: Cisco published software maintenance fixes tracked under Bug ID CSCwv01048, confirming no operational workarounds exist.