CVE-2020-3535 Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability

High 7.8 Published 8 Oct 2020 Updated 13 Nov 2024

Local attackers can execute arbitrary code with another user's privileges by placing a malicious DLL in a specific directory.

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-2020-3535?

CVE-2020-3535 is a high-severity code injection vulnerability in Cisco Webex Teams, published on 8 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the loading mechanism of specific DLLs in the Cisco Webex Teams client for Windows could allow an authenticated, local attacker to load a malicious library. To exploit this vulnerability, the attacker needs valid credentials on the Windows system. The vulnerability is due to incorrect handling of directory paths at run time. An attacker could exploit this vulnerability by placing a malicious DLL file in a specific location on the targeted system. This file will execute when the vulnerable application launches. A successful exploit could allow the attacker to execute arbitrary code on the targeted system with the privileges of another user’s account.

Weakness: CWE-427

Which versions are affected by CVE-2020-3535?

It affects 1 product.

Products include Cisco Webex Teams.

How do I fix CVE-2020-3535?

No fix has been published for CVE-2020-3535 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2020-3535 being exploited?

There is no known exploitation of CVE-2020-3535 in the wild and no public exploit code.

Sources

Also known as GHSA-v4rq-rq59-hgx8.