CVE-2021-1589: Cisco SD-WAN

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

A vulnerability in the disaster recovery feature of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to gain unauthorized access to user credentials. This vulnerability exists because access to API endpoints is not properly restricted. An attacker could exploit this vulnerability by sending a request to an API endpoint. A successful exploit could allow the attacker to gain unauthorized access to administrative credentials that could be used in further attacks.

Affected products

• Cisco SD-WAN: from 20.3, before 20.3.4 (fixed in 20.3.4); from 20.4, before 20.4.2 (fixed in 20.4.2); from 20.5, before 20.5.2 (fixed in 20.5.2); from 20.6, before 20.6.1 (fixed in 20.6.1)

Published 2021-09-23. Last modified 2026-06-17.