CVE-2021-1478: Cisco Hosted Collaboration Mediation Fulfillment

Medium severity, CVSS 6.5. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability in the Java Management Extensions (JMX) component of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to an unsecured TCP/IP port. An attacker could exploit this vulnerability by accessing the port and restarting the JMX process. A successful exploit could allow the attacker to cause a DoS condition on an affected system.

Affected products

• Cisco Hosted Collaboration Mediation Fulfillment: before 12.6 (fixed in 12.6)
• Cisco Unified Communications Manager: before 12.6 (fixed in 12.6)

Published 2021-05-06. Last modified 2026-06-17.