CVE-2026-21742 Fortinet CVE debrief

Who should care

Security teams and administrators responsible for Fortinet FortiSOAR PaaS and on-premise deployments should prioritize patching this vulnerability to prevent potential exposure of sensitive information.

Technical summary

The vulnerability exists in multiple versions of Fortinet FortiSOAR PaaS and on-premise deployments, specifically in the handling of Secure Message Exchange and Radius queries. An authenticated attacker could potentially view cleartext passwords in responses if these features are configured. This vulnerability affects various versions of FortiSOAR, including PaaS 7.6.0 through 7.6.3, PaaS 7.5.0 through 7.5.2, PaaS 7.4, PaaS 7.3, on-premise 7.6.0 through 7.6.2, on-premise 7.5.0 through 7.5.1, on-premise 7.4, and on-premise 7.3. The vulnerability allows an authenticated attacker to access sensitive information, specifically cleartext passwords, under certain configurations.

Defensive priority

Medium priority due to the requirement for authentication and specific configuration for exploitation.

Recommended defensive actions

• Apply patches or updates provided by Fortinet for the affected FortiSOAR versions.
• Review and update configurations for Secure Message Exchange and Radius queries to minimize exposure.
• Monitor for any unauthorized access or suspicious activity related to FortiSOAR systems.
• Implement additional security measures such as encryption for sensitive data in transit.
• Conduct regular security audits and vulnerability assessments.

Evidence notes

The CVE record and NVD detail provide information on the vulnerability, affected versions, and potential impact. Vendor advisory from Fortinet is available for mitigation and patching guidance. Security teams should verify the configurations of Secure Message Exchange and Radius queries in their FortiSOAR deployments to identify potential exposure. Evidence of exploitation or unauthorized access should be monitored, and additional security measures such as encryption for sensitive data in transit should be considered. Regular security audits and vulnerability assessments are recommended to ensure the security posture of FortiSOAR systems.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.