Single Sign-On Vulnerability in Cisco Webex Services
CVE-2026-20184

9.8CRITICAL

Key Information:

Vendor

Cisco
Status
Cisco Webex Meetings
Vendor
CVE Published:
15 April 2026

Badges

👾 Exploit Exists

What is CVE-2026-20184?

A vulnerability in the single sign-on (SSO) integration with Control Hub in Cisco Webex Services allows unauthenticated remote attackers to impersonate legitimate users. This vulnerability arises from improper validation of certificates, enabling attackers to exploit the system by sending specially crafted tokens to a service endpoint, thereby gaining unauthorized access to sensitive services.

Affected Version(s)

Cisco Webex Meetings 39.7.7

Cisco Webex Meetings 39.9

Cisco Webex Meetings 40.4.10

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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