CVE-2026-35616

critical

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.

From the Tenable Blog

CVE-2026-35616 Fortinet FortiClientEMS zero-day exploited

Published: 2026-04-06

CVE-2026-35616 Fortinet FortiClientEMS zero-day exploited in the wild

References

https://www.securityweek.com/3-recently-patched-fortinet-fortisandbox-vulnerabilities-in-hacker-crosshairs/

https://thehackernews.com/2026/06/attackers-exploit-three-fortinet.html

https://securityaffairs.com/193709/ai/fortinet-warned-as-three-critical-fortisandbox-bugs-come-under-attack.html

https://www.bleepingcomputer.com/news/security/china-linked-jdy-botnet-expands-targeting-of-us-military-networks/

https://thehackernews.com/2026/06/china-linked-jdy-botnet-expands-to-1500.html

https://www.helpnetsecurity.com/2026/05/29/forticlient-ems-vulnerability-infostealer/

https://www.securityweek.com/critical-forticlient-ems-vulnerability-exploited-in-fresh-attacks/

https://www.bleepingcomputer.com/news/security/hackers-exploit-forticlient-ems-flaw-to-push-infostealer-malware/

https://thehackernews.com/2026/05/threat-actors-exploit-critical.html

https://securityaffairs.com/192817/malware/cve-2026-35616-forticlient-ems-flaw-actively-exploited-in-malware-attacks.html

https://arcticwolf.com/resources/blog/forticlient-ems-exploited-via-cve-2026-35616-to-deliver-ekz-infostealer-disguised-as-a-fortinet-patch/

https://www.bleepingcomputer.com/news/security/fortinet-warns-of-critical-rce-flaws-in-fortisandbox-and-fortiauthenticator/

https://thehackernews.com/2026/05/pan-os-globalprotect-authentication.html

https://www.theregister.com/2026/04/15/critical_fortinet_sandbox_bugs/

https://www.infosecurity-magazine.com/news/fortinet-emergency-patch-ems-bug/

https://securityaffairs.com/190425/security/u-s-cisa-adds-a-flaw-in-fortinet-forticlient-ems-to-its-known-exploited-vulnerabilities-catalog.html

https://www.theregister.com/2026/04/06/forticlient_ems_bug_exploited/

https://www.securityweek.com/fortinet-rushes-emergency-fixes-for-exploited-zero-day/

https://www.databreachtoday.com/attackers-target-zero-day-flaw-in-fortinet-security-software-a-31344

https://www.darkreading.com/vulnerabilities-threats/fortinet-emergency-patch-forticlient-zero-day

https://www.cisa.gov/news-events/alerts/2026/04/06/cisa-adds-one-known-exploited-vulnerability-catalog

https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-fortinet-flaw-exploited-in-attacks-by-friday/

https://therecord.media/singapore-us-warn-of-fortinet-bug-exploited

https://securityaffairs.com/190392/hacking/cve-2026-35616-fortinet-fixes-actively-exploited-high-severity-flaw.html

https://cyberscoop.com/fortinet-forticlient-ems-zero-day-cve-2026-35616-hotfix-known-exploited/

https://www.bleepingcomputer.com/news/security/new-fortinet-forticlient-ems-flaw-cve-2026-35616-exploited-in-attacks/

https://thehackernews.com/2026/04/fortinet-patches-actively-exploited-cve.html

https://www.helpnetsecurity.com/2026/04/04/forticlient-ems-zero-day-cve-2026-35616/

https://fortiguard.fortinet.com/psirt/FG-IR-26-099

https://www.bleepingcomputer.com/news/security/cisa-flags-apache-activemq-flaw-as-actively-exploited-in-attacks/

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-35616

Details

Source: Mitre, NVD

Published: 2026-04-04

Updated: 2026-04-06

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest

Detections

Analytics