Overview of the Cisco Webex Vulnerability
A recent discovery has uncovered a high-severity vulnerability in Cisco Webex, identified as CVE-2025-20236. This flaw exists in the Webex custom URL parser and poses a critical risk, allowing unauthenticated attackers to execute remote code on the client-side through malicious meeting invitations.
Understanding the Vulnerability
The issue stems from inadequate input validation during the processing of Webex meeting invite links. Attackers can exploit this by duping users into clicking malicious links, leading to unauthorized downloads and potential command execution on their devices.
Implications for Users
This vulnerability affects all Cisco Webex App installations, irrespective of the operating system or configuration used. The potential impact is significant as it allows attackers to perform actions with the same privileges as the targeted user.
Action Required: Update Your Software
Due to the lack of alternative workarounds, Cisco strongly advises users to update their software immediately to prevent potential exploits. Below are details on the versions affected and the first fixed release:
- Webex App Release 44.5 and earlier: Not vulnerable.
- Webex App Release 44.6: Update to 44.6.2.30589.
- Webex App Release 44.7: Migrate to a fixed release.
- Webex App Release 44.8 and later: Not vulnerable.
Additional Security Updates from Cisco
This week, Cisco has also patched other critical vulnerabilities:
- A privilege escalation flaw in Secure Network Analytics which allows attackers with administrative privileges to execute commands as root.
- An LDAP user enumeration flaw in Nexus Dashboard, enabling attackers to remotely identify valid usernames.
Additional Recommendations
The Cisco Product Security Incident Response Team (PSIRT) assures users that there are currently no known exploits in the wild directly targeting these vulnerabilities. However, the proactive application of these security patches is strongly recommended.
Stay Secure
For more detailed information and to ensure your systems are fully protected against these vulnerabilities, refer to Cisco’s official advisories and secure your systems accordingly.
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Last Updated: April 18, 2025
