Fortinet FortiClient EMS Improper Access Control Vulnerability (CVE-2026-35616)
Severity: critical · Patch status: patched · Since 2026-04-06 · CVE-2026-35616
Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests. CISA added CVE-2026-35616 to its Known Exploited Vulnerabilities catalog on Apr 6, 2026, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Apr 9, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch