CVE entry · CVE-2026-35616
CVE-2026-35616: Fortinet FortiClient EMS Improper Access Control Vulnerability
Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
- Actively exploited: added to CISA’s KEV catalog on April 6, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: April 9, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Fortinet FortiClient EMS, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
Other Fortinet vulnerabilities
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Fortinet Multiple Products Path Traversal Vulnerability
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Fortinet FortiMail Path Traversal Vulnerability
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Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
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Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
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Fortinet FortiSandbox OS Command Injection Vulnerability
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Fortinet FortiSandbox OS Command Injection Vulnerability