CVE-2026-20210

Medium

Description

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to modify configurations and perform unauthorized actions on an affected system. This vulnerability exists because of a failure to redact sensitive information within device configurations and templates. An attacker could exploit this vulnerability by elevating their read-only permissions to those of a high-privileged user. A successful exploit could allow the attacker to access or modify configuration settings within Cisco Catalyst SD-WAN Manager as a high-privileged user.

SeverityMedium
CVSS5.4
Exploit probability—
ProductCisco Catalyst Sd-wan Manager
PublishedMay 14, 2026
First seenMay 14, 2026
Weakness typeCWE-779CWE-779

How to fix

Update
  • cisco catalyst_sd-wan_manager20.9.9.1, 20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 26.1.1.1 or later

Affected products

ProductAffected versionsFixed in
cisco catalyst_sd-wan_managerv < 20.9.9.1, 20.10 ≤ v < 20.12.5.4, 20.12.6 ≤ v < 20.12.6.2, 20.13 ≤ v < 20.15.4.4, 20.15.5 ≤ v < 20.15.5.2, 20.16 ≤ v < 20.18.2.2, 26.1 ≤ v < 26.1.1.1, 20.12.720.9.9.1, 20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 26.1.1.1

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.