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CVE-2026-35616

CRITICAL9.8
CISA KEV

Published 2026-04-04 · Updated 2026-07-24 · Source psirt@fortinet.com

Summary

CVE-2026-35616 is a critical-severity (CVSS 9.8) vulnerability in Fortinet FortiClient EMS. CISA added it to the Known Exploited Vulnerabilities catalog on April 6, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 9, 2026. CISA does not currently list it as used in ransomware campaigns. Fortinet has 32 vulnerabilities in the KEV catalog, 14 of them linked to ransomware.

All 32 known-exploited Fortinet vulnerabilities →

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 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-284

CISA Known-Exploited Vulnerability

Product: Fortinet — FortiClient EMS

Name: Fortinet FortiClient EMS Improper Access Control Vulnerability

Date added: 2026-04-06 · Due: 2026-04-09

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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