What is CVE-2026-35616?
A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
Timeline
- 2026-04-04Published to the U.S. National Vulnerability Database (NVD)
- 2026-04-06First covered in a defend.network daily briefing
- 2026-04-06Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-04-09CISA federal remediation deadline (BOD 22-01)
- 2026-07-24NVD record last updated
CISA Known Exploited Vulnerability
Fortinet FortiClient EMS Improper Access Control Vulnerability
Affected product
Fortinet FortiClient EMS
Remediation Steps
- Apply emergency out-of-band security patch released by Fortinet immediately
- Review FortiClient EMS access logs for unauthorized API access attempts
- Reset credentials for all administrative and service accounts
- Implement network segmentation to restrict FortiClient EMS access
- Monitor for indicators of privilege escalation or lateral movement
References
- https://fortiguard.fortinet.com/psirt/FG-IR-26-099
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-35616
- https://www.fortinet.com/psirt
- https://cisa.gov/news-events
- https://nvd.nist.gov/vuln/detail/CVE-2026-35616
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 1 of April 2026 (April 6 – 12)
- FortiClient EMS, GitHub secrets, CISA breach: critical exploitation ongoing (2026-05-29)
- FortiClient EMS, Gogs RCE actively exploited; CISA GitHub leak exposes AWS keys (2026-05-28)
- Iran & DPRK target Microsoft 365; GitHub C2 supply-chain attacks (2026-04-07)
- FortiClient RCE exploited; DPRK & Chinese APTs hit EU institutions (2026-04-06)
Related vulnerabilities
- CVE-2026-104286 – Fortinet FortiMail (same vendor)
- CVE-2026-25089 – Fortinet FortiSandbox (same vendor)
- CVE-2025-61624 – Fortinet Multiple Products (same vendor)
- CVE-2026-39808 – Fortinet FortiSandbox (same vendor)
- CVE-2026-39813 – Fortinet Fortisandbox (same vendor)
- CVE-2025-68686 – Fortinet FortiOS (same vendor)
Browse all tracked CVEs in the defend.network CVE database →
🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.