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vulnerabilitycriticalIdentity SpoofingRemote Code ExecutionCVE-2026-20184

Apr 16, 2026 • [email protected] (The Hacker News)

Cisco Patches Four Critical Identity Services, Webex Flaws Enabling Code Execution

Cisco has issued urgent security patches addressing four critical vulnerabilities affecting its Identity Services and Webex Services platforms. These flaws,...

Source
The Hacker News
Category
vulnerability
Severity
critical

Executive Summary

Cisco has issued urgent security patches addressing four critical vulnerabilities affecting its Identity Services and Webex Services platforms. These flaws, including CVE-2026-20184 with a CVSS score of 9.8, stem from improper certificate validation within single sign-on (SSO) integrations. Successful exploitation could allow attackers to execute arbitrary code remotely and impersonate any user within the service, posing significant risks to organizational identity security and data integrity. The severity is classified as critical due to the high potential for unauthorized access and system compromise. Cisco advises immediate application of the provided patches to mitigate these risks. Organizations utilizing affected Cisco services should prioritize updates to prevent potential remote code execution and identity spoofing attacks. No specific threat actors or malware campaigns are currently linked to these vulnerabilities, but the high severity warrants prompt remediation to secure enterprise communication and identity management infrastructure against potential exploitation.

Summary

Cisco has announced patches to address four critical security flaws impacting Identity Services and Webex Services that could result in arbitrary code execution and allow an attacker to impersonate any user within the service. The details of the vulnerabilities are below - CVE-2026-20184 (CVSS score: 9.8) - An improper certificate validation in the integration of single sign-on (SSO)

Published Analysis

Cisco has issued urgent security patches addressing four critical vulnerabilities affecting its Identity Services and Webex Services platforms. These flaws, including CVE-2026-20184 with a CVSS score of 9.8, stem from improper certificate validation within single sign-on (SSO) integrations. Successful exploitation could allow attackers to execute arbitrary code remotely and impersonate any user within the service, posing significant risks to organizational identity security and data integrity. The severity is classified as critical due to the high potential for unauthorized access and system compromise. Cisco advises immediate application of the provided patches to mitigate these risks. Organizations utilizing affected Cisco services should prioritize updates to prevent potential remote code execution and identity spoofing attacks. No specific threat actors or malware campaigns are currently linked to these vulnerabilities, but the high severity warrants prompt remediation to secure enterprise communication and identity management infrastructure against potential exploitation. Cisco has announced patches to address four critical security flaws impacting Identity Services and Webex Services that could result in arbitrary code execution and allow an attacker to impersonate any user within the service. The details of the vulnerabilities are below - CVE-2026-20184 (CVSS score: 9.8) - An improper certificate validation in the integration of single sign-on (SSO) Cisco has announced patches to address four critical security flaws impacting Identity Services and Webex Services that could result in arbitrary code execution and allow an attacker to impersonate any user within the service. The details of the vulnerabilities are below - CVE-2026-20184 (CVSS score: 9.8) - An improper certificate validation in the integration of single sign-on (SSO)

Linked Entities

  • CVE-2026-20184