CVE-2026-20184: Improper Certificate Validation in Cisco Cisco Webex Meetings
A vulnerability in the integration of single sign-on (SSO) with Control Hub in Cisco Webex Services could have allowed an unauthenticated, remote attacker to impersonate any user within the service. This vulnerability existed because of improper certificate validation. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by connecting to a service endpoint and supplying a crafted token. A successful exploit could have allowed the attacker to gain unauthorized access to legitimate Cisco Webex services.
AI Analysis
Technical Summary
This vulnerability arises from improper certificate validation in the SSO integration of Cisco Webex Meetings with Control Hub. An attacker could exploit this by connecting to a service endpoint and presenting a crafted token, enabling impersonation of any user without authentication. The vulnerability affects many versions of Cisco Webex Meetings and carries a CVSS 3.1 score of 9.8, reflecting critical impact on confidentiality, integrity, and availability. No official remediation level or patch information is provided in the data, and no known exploits have been reported.
Potential Impact
An attacker exploiting this vulnerability could gain unauthorized access to Cisco Webex services by impersonating any user. This compromises user confidentiality and service integrity, and could disrupt availability. Given the critical CVSS score of 9.8, the impact is severe, potentially allowing full control over user sessions within the affected service.
Mitigation Recommendations
Patch status is not yet confirmed — check the Cisco vendor advisory for current remediation guidance. Until an official fix is available, organizations should monitor Cisco's security advisories for updates. No specific temporary mitigations are provided in the available data.
CVE-2026-20184: Improper Certificate Validation in Cisco Cisco Webex Meetings
Description
A vulnerability in the integration of single sign-on (SSO) with Control Hub in Cisco Webex Services could have allowed an unauthenticated, remote attacker to impersonate any user within the service. This vulnerability existed because of improper certificate validation. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by connecting to a service endpoint and supplying a crafted token. A successful exploit could have allowed the attacker to gain unauthorized access to legitimate Cisco Webex services.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper certificate validation in the SSO integration of Cisco Webex Meetings with Control Hub. An attacker could exploit this by connecting to a service endpoint and presenting a crafted token, enabling impersonation of any user without authentication. The vulnerability affects many versions of Cisco Webex Meetings and carries a CVSS 3.1 score of 9.8, reflecting critical impact on confidentiality, integrity, and availability. No official remediation level or patch information is provided in the data, and no known exploits have been reported.
Potential Impact
An attacker exploiting this vulnerability could gain unauthorized access to Cisco Webex services by impersonating any user. This compromises user confidentiality and service integrity, and could disrupt availability. Given the critical CVSS score of 9.8, the impact is severe, potentially allowing full control over user sessions within the affected service.
Mitigation Recommendations
Patch status is not yet confirmed — check the Cisco vendor advisory for current remediation guidance. Until an official fix is available, organizations should monitor Cisco's security advisories for updates. No specific temporary mitigations are provided in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.394Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69dfb9f882d89c981f6ee6bb
Added to database: 4/15/2026, 4:16:56 PM
Last enriched: 4/15/2026, 4:31:51 PM
Last updated: 4/15/2026, 5:17:27 PM
Views: 4
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