CVE-2026-35616
Actively exploited. CVE-2026-35616 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-06) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-35616 is indexed in GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
CSIRTS triage
- What
- Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
- Who is affected
- Deployments of FortiClient EMS.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Update to the latest version of FortiClient EMS.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99.8% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-35616 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (2)
- criticalexploitedCVE-2026-35616: Fortinet FortiClient EMS Improper Access Control Vulnerabilitycisa-kev · 2026-04-06
- unknownAPI authentication and authorization bypassfortinet · 2026-04-04
External references
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[](https://www.csirts.com/cve/CVE-2026-35616)