Forwarded from Taiwan Computer Network Crisis Management and Coordination Center: Cybersecurity Alert TWCERTCC-200-202604-00000019

[Content Description]
Cisco recently released a critical cybersecurity vulnerability announcement (CVE-2026-20184, CVSS: 9.8). This vulnerability stems from improper credential verification. During the integration of Cisco Webex Services Single Sign-On (SSO) and Control Hub, it may allow unauthenticated remote attackers to impersonate any user within the service.

[Affected Platforms]
When Cisco Webex Services is configured to integrate with Control Hub via SSO

[Recommended Actions]
Repair according to the solutions released on the official website:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cui-cert-8jSZYhWL

[References]
1. https://www.twcert.org.tw/tw/cp-169-10850-80e46-1.html