---
title: "CVE-2026-35616: Fortinet FortiClient EMS Improper Access Control Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-35616/
description: "CVE-2026-35616 (Fortinet FortiClient EMS): Exploited in the wild (CISA KEV). A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-04-04
date_modified: 2026-07-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-35616"
kev: true
cvss: 9.1
epss: 0.93983
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Fortinet FortiClient EMS. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-04-06, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-04-09 ; treat that as the outer limit, not the target.
- EPSS 94.0% , percentile 99.8: FIRST’s model estimates a 94.0% chance of exploitation activity in the next 30 days, higher than 99.8% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

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.

## Affected products (CVE record)

- Fortinet FortiClientEMS: 7.4.5 <= 7.4.6

## Severity

- fortinet CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C`

## Exploitation

- CISA KEV: added 2026-04-06; federal due date 2026-04-09. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 93.98% probability of exploitation activity in the next 30 days; percentile 99.8.

## Sources

- [Listed in CISA KEV notes (fortiguard.fortinet.com)](https://fortiguard.fortinet.com/psirt/FG-IR-26-099)
- [CVE.org record CVE-2026-35616](https://www.cve.org/CVERecord?id=CVE-2026-35616)
- [NVD entry CVE-2026-35616](https://nvd.nist.gov/vuln/detail/CVE-2026-35616)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-35616)

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Source page: https://erroneo.us/security/cve/CVE-2026-35616/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt