CVE-2026-35616
Fortinet FortiClient EMS Improper Access Control Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 9 April 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 90.75% probability · 100th percentile
- CISA KEV
- Listed 6 April 2026 · due 9 April 2026
- Weakness
- CWE-284
- Affected
- fortinet/forticlientems
- Source
- psirt@fortinet.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Please adhere to Fortinet's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-099 ; https://nvd.nist.gov/vuln/detail/CVE-2026-35616
References
- https://fortiguard.fortinet.com/psirt/FG-IR-26-099Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-35616US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.