CVEs / CVE-2026-35616

CVE-2026-35616: Fortinet FortiClient EMS Improper Access Control Vulnerability

Known exploited in the CISA KEV catalog since 6 Apr 2026
critical 9.8 CVSS 3.1 (from the CNA)
EPSS 93.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 24 Jul 2026

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Summary

Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
CISA, Known Exploited Vulnerabilities catalog

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.
The CVE record, via NVD · published 4 Apr 2026 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Fortinet FortiClientEMS	from 7.4.5, up to and including 7.4.6	—

Exploitation

In CISA KEV since	6 Apr 2026
Due date for US federal agencies	9 Apr 2026
Used in ransomware campaigns	Unknown
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.

Severity

CVSS 3.1	9.8 critical `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by the CNA ([email protected])
Weakness	CWE-284

References

CVE-2026-35616 on NVD
CVE-2026-35616 in the CISA KEV catalog
https://fortiguard.fortinet.com/psirt/FG-IR-26-099 (cited by CISA)
https://fortiguard.fortinet.com/psirt/FG-IR-26-099 Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-35616 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.