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.
CVSSv3 Score: 9.1 An Improper Access Control vulnerability [CWE-284] in FortiClient EMS may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.Fortinet has observed this to be exploited in the wild and urges vulnerable customers to install the hotfix for FortiClient EMS 7.4.5 and 7.4.6, by following the instructions at:https://docs.fortinet.com/document/forticlient/7.4.5/ems-release-notes/832484 - for FortiClientEMS 7.4.5https://docs.fortinet.com/document/forticlient/7.4.6/ems-release-notes/832484 - for FortiClientEMS 7.4.6Upcoming FortiClientEMS 7.4.7 will also include a fix for this issue. In the meantime the hotfix above is sufficient to prevent it entirely. Revised on 2026-04-04 00:00:00
CSIRTS triage
- What
- An improper access control vulnerability allows unauthenticated attackers to execute unauthorized code or commands.
- Who is affected
- Customers using FortiClient EMS versions 7.4.5 and 7.4.6 are affected.
- Urgency
- Remediation is urgent as the vulnerability is actively exploited in the wild.
- Action
- Install the hotfix for FortiClient EMS 7.4.5 and 7.4.6.
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 100% 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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