CVE-2026-59836 in FortiClient EMS
A improper certificate validation vulnerability in Fortinet FortiClientEMS 7.4.3 through 7.4.5, FortiClientEMS 7.4.0 through 7.4.1, FortiClientEMS 7.2 all versions may allow attacker to information disclosure via <insert attack vector here>
Quick answer
Fortinet FortiClient EMS should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- FortiClient EMS 7.4.3 through 7.4.5
- FortiClient EMS 7.4.0 through 7.4.1
- FortiClient EMS 7.2 all versions
Fixed versions
- Upgrade FortiClient EMS to the fixed release listed by Fortinet
How to fix it
Update FortiClient EMS. The old version can expose data, allow unsafe access, or let an attacker run commands.
- Check the exact Fortinet product and branch in use.
- Upgrade to Upgrade FortiClient EMS to the fixed release listed by Fortinet.
- Follow Fortinet upgrade path guidance.
- Limit admin access until the update is done.
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Verify the fix
- Confirm the Fortinet product reports a fixed version.
- Scan again and confirm CVE-2026-59836 is gone.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-59836?
Fortinet FortiClient EMS versions listed as affected should be reviewed: FortiClient EMS 7.4.3 through 7.4.5, FortiClient EMS 7.4.0 through 7.4.1, FortiClient EMS 7.2 all versions.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.