CVE-2023-20034: Cisco SD-WAN

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Vulnerability in the Elasticsearch database used in the of Cisco SD-WAN vManage software could allow an unauthenticated, remote attacker to access the Elasticsearch configuration database of an affected device with the privileges of the elasticsearch user. These vulnerability is due to the presence of a static username and password configured on the vManage. An attacker could exploit this vulnerability by sending a crafted HTTP request to a reachable vManage on port 9200. A successful exploit could allow the attacker to view the Elasticsearch database content. There are workarounds that address this vulnerability.

Affected products

• Cisco SD-WAN: from 20.3, before 20.3.4 (fixed in 20.3.4); version 20.6 only; version 20.7 only

Published 2023-09-27. Last modified 2026-06-17.