Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulnerabilities

Vulnerability

The vulnerability exists in Cisco Webex Network Recording Player and Cisco Webex Player for Windows due to insufficient validation of certain elements within Webex recordings stored in Advanced Recording Format (ARF) or Webex Recording Format (WRF). Affected versions include those prior to the fixed releases detailed in the vendor advisory [1]. An attacker must deliver a specially crafted ARF or WRF file to a user, which can be done via a link or email attachment [1].

Exploitation

To exploit this vulnerability, an attacker needs no authenticated access or special network position—only the ability to send a malicious file to a target user. The user must be persuaded to open the file with the affected software on their local Windows system. No additional user interaction beyond opening the file is required; the insufficient validation triggers the code execution path automatically upon file load [1].

Impact

Successful exploitation allows the attacker to execute arbitrary code on the affected system with the privileges of the targeted user. This can result in full compromise of the user's session, including potential installation of programs, viewing, changing, or deleting data, and creating new accounts with full user rights [1].

Mitigation

Cisco has released free software updates to address these vulnerabilities. Customers are advised to upgrade to the fixed versions specified in the Cisco Security Advisory [1]. No workarounds are available; patching is the recommended mitigation. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog as of the publication date.