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Fortinet PSIRT AdvisoriesFG-IR-26-247

Improper certificate validation in RADIUS protocol

HighVendor CVSS 7.5 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC

Summary

CVSSv3 Score:

7.5

An Improper Certificate Validation vulnerability [CWE-295] in FortiSASE Sovereign, FortiManager, Fortianalyzer, FortiManager Cloud and FortiAnalyzer Cloud RADIUS protocol may allow a MITM attacker to impersonate the radius server via a rogue RADIUS server.

Revised on 2026-11-10 00:00:00

Products covered

  • FortiSASE

  • FortiManager

  • FortiManager Cloud

  • FortiAnalyzer Cloud

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 1

Updates

  1. Published by Fortinet

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.