CVE-2020-3406 Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability

Medium 6.4 Published 16 Jul 2020 Updated 13 Nov 2024

An authenticated attacker can execute arbitrary scripts or access sensitive data by tricking a user into clicking a crafted link in the Cisco SD-WAN vManage interface.

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-2020-3406?

CVE-2020-3406 is a medium-severity cross-site scripting vulnerability in Cisco SD-WAN vManage, published on 16 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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

Weakness: CWE-79

Which versions are affected by CVE-2020-3406?

It affects 1 product.

Products include Cisco Sd-Wan Firmware.

How do I fix CVE-2020-3406?

No fix has been published for CVE-2020-3406 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-3406 being exploited?

There is no known exploitation of CVE-2020-3406 in the wild and no public exploit code.

Sources

Also known as GHSA-43p9-75r2-vgfm.