CVE-2026-20210 Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability

Medium 5.4 Published 14 May 2026 Updated 15 May 2026

Authenticated read-only users can escalate privileges to modify configurations in Cisco Catalyst SD-WAN Manager due to sensitive information exposure.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20210?

CVE-2026-20210 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-779

Which versions are affected by CVE-2026-20210?

It affects 1 product.

Products include Cisco Catalyst Sd-Wan Manager.

How do I fix CVE-2026-20210?

No fix has been published for CVE-2026-20210 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20210 being exploited?

There is no known exploitation of CVE-2026-20210 in the wild and no public exploit code.

All Cisco Catalyst Sd-Wan Manager vulnerabilities

Sources

Also known as GHSA-m7f8-vg5v-4m9m.