By Abinaya
Publication Date: 2026-04-16 09:37:00
Cisco has issued a critical security advisory warning of a severe vulnerability in its cloud-based Webex Services. Tracked as CVE-2026-20184, this flaw carries a maximum Common Vulnerability Scoring System (CVSS) base score of 9.8 out of 10
According to the advisory published on April 15, 2026, the vulnerability enables an unauthenticated, remote threat actor to completely bypass authentication mechanisms and impersonate any legitimate user on the platform.
The vulnerability specifically affects organizations that use single sign-on (SSO) integration in the Webex Control Hub.
Because Webex is a widely used enterprise collaboration tool, the ability for an outsider to seamlessly impersonate users poses a massive risk to corporate data, internal communications, and meeting privacy.
Cisco Webex Services Vulnerability
The core issue stems from improper certificate validation within the Webex service’s SSO implementation, categorized as…
