CVE-2026-35616 — Fortinet FortiClient EMS Improper Access Control Vulnerability
Overview
Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
Vulnerability details
- CVE ID
- CVE-2026-35616
- Vulnerability
- Fortinet FortiClient EMS Improper Access Control Vulnerability
- Vendor
- Fortinet
- Affected products
- Fortinet: FortiClient EMS
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- EPSS score
- 88.5% probability of exploitation in 30 days · 100th percentile
- Published
- 2026-04-06
Remediation guidance
CVE-2026-35616 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for Fortinet the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
FIRST EPSS estimates a 88.5% probability that CVE-2026-35616 will be exploited within the next 30 days (100th percentile of all CVEs) — useful for risk-based patch sequencing.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2026-35616 — and stay ahead of the next one
CVE-2026-35616 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2026-35616 and other Fortinet issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
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