CVE-2021-1507: Cisco SD-WAN Vmanage

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability in an API of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against users of the application web-based interface. This vulnerability exists because the API does not properly validate user-supplied input. An attacker could exploit this vulnerability by sending malicious input to the API. A successful exploit could allow the attacker to execute arbitrary script code in the context of the web-based interface or access sensitive, browser-based information.

Affected products

• Cisco SD-WAN Vmanage: before 20.5.1 (fixed in 20.5.1)

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