CVE-2020-26071 Cisco SD-WAN vEdge Arbitrary File Creation Vulnerability

High 8.4 Published 18 Nov 2024 Updated 18 Nov 2024

An authenticated local attacker can create or overwrite arbitrary files on Cisco SD-WAN devices via CLI commands, causing a denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-26071?

CVE-2020-26071 is a high-severity path traversal vulnerability in Cisco Catalyst Sd-Wan Manager, published on 18 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to create or overwrite arbitrary files on an affected device, which could result in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation for specific commands. An attacker could exploit this vulnerability by including crafted arguments to those specific commands. A successful exploit could allow the attacker to create or overwrite arbitrary files on the affected device, which could result in a DoS condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Weakness: CWE-22

Which versions are affected by CVE-2020-26071?

It affects 1 product.

Products include Cisco Catalyst Sd-Wan Manager.

How do I fix CVE-2020-26071?

No fix has been published for CVE-2020-26071 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-26071 being exploited?

There is no known exploitation of CVE-2020-26071 in the wild and no public exploit code.

All Cisco Catalyst Sd-Wan Manager vulnerabilities

Sources

Also known as GHSA-ww45-hmjq-p5q2.