Arbitrary code execution in Cisco Webex App

1) Inclusion of Functionality from Untrusted Control Sphere

EUVDB-ID: #VU107564

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-20236

CWE-ID: CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient input validation in the custom URL parser when Cisco Webex App processes a meeting invite link. A remote attacker can trick the victim to click a crafted meeting invite link and download arbitrary files, which can later be executed on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Webex Meetings Desktop App: 44.6.0.29928 - 44.7.0.30285

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_webex_meetings_desktop_app:44.6.0.29928:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_webex_meetings_desktop_app:44.6.0.30148:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_webex_meetings_desktop_app:44.7.0.30141:*:*:*:*:*:*:*

External links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-app-client-rce-ufyMMYLC
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn07296

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.