CVE-2019-1720: Cisco Telepresence Video Communication Server

Medium severity, CVSS 4.9. EPSS: 1.7% chance of exploitation in the next 30 days.

A vulnerability in the XML API of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to cause the CPU to increase to 100% utilization, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to improper handling of the XML input. An attacker could exploit this vulnerability by sending a specifically crafted XML payload. A successful exploit could allow the attacker to exhaust CPU resources, resulting in a DoS condition until the system is manually rebooted. Software versions prior to X12.5.1 are affected.

Affected products

• Cisco Telepresence Video Communication Server: before x12.5.1 (fixed in x12.5.1)

Published 2019-04-18. Last modified 2026-06-17.