CVE-2025-20236 Cisco Webex App Client-Side Remote Code Execution Vulnerability
An attacker can execute arbitrary commands on a user's host by tricking them into clicking a crafted meeting invite link in Cisco Webex App.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-20236?
CVE-2025-20236 is a high-severity code injection vulnerability in Cisco Webex Teams, published on 16 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability in the custom URL parser of Cisco Webex App could allow an unauthenticated, remote attacker to persuade a user to download arbitrary files, which could allow the attacker to execute arbitrary commands on the host of the targeted user. This vulnerability is due to insufficient input validation when Cisco Webex App processes a meeting invite link. An attacker could exploit this vulnerability by persuading a user to click a crafted meeting invite link and download arbitrary files. A successful exploit could allow the attacker to execute arbitrary commands with the privileges of the targeted user.
Weakness: CWE-829
Which versions are affected by CVE-2025-20236?
It affects 1 product.
Products include Cisco Webex Teams.
How do I fix CVE-2025-20236?
No fix has been published for CVE-2025-20236 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-2025-20236 being exploited?
There is no known exploitation of CVE-2025-20236 in the wild and no public exploit code.
Other vulnerabilities in Cisco Webex Teams
- CVE-2018-0387 Code injection in Cisco Webex Teams unknown
- CVE-2018-0436 Cisco Webex Teams Information Disclosure and Modification Vulnerability
- CVE-2020-3535 Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability
- CVE-2019-1636 Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability
- CVE-2019-1939 Cisco Webex Teams Logging Feature Command Execution Vulnerability
Sources
Also known as GHSA-rv87-h47c-m27v.