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9.1
CVE-2026-35616KEVEXPLOITEDPATCHED
fortinet · forticlientems

CVE-2026-35616: A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated atta

Description

The flaw can be exploited remotely via crafted requests for remote code execution (RCE) and does not require authentication. The observed execution pattern suggests that threat actors used FortiClient’s own management pathway to push malicious PowerShell commands to managed endpoints in a way that resembled legitimate management operations. The information-stealing malware deployed in these attacks targets Chrome, Microsoft Edge, Firefox, and other Chromium and Gecko-based browsers for credential, cookie, and autofill data theft. The harvested data is exfiltrated over HTTP.

Affected Products

VendorProductVersions
fortinetforticlientems7.4.5

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
fortinetforticlientcert_advisory90%

References

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

Related News (20 articles)

Tier D
SecurityWeek1h ago
Critical FortiClient EMS Vulnerability Exploited in Fresh Attacks
→ No new info (linked only)
Tier D
BleepingComputer15d ago
Fortinet warns of critical RCE flaws in FortiSandbox and FortiAuthenticator
→ No new info (linked only)
Tier B
CERT-FR45d ago
Bulletin d'actualité CERTFR-2026-ACT-017 (13 avril 2026)
→ No new info (linked only)
Tier B
CCCS Canada50d ago
AL26-007 - Vulnerability impacting Fortinet FortiClientEMS - CVE-2026-35616
→ No new info (linked only)
Tier B
CCCS Canada51d ago
Fortinet security advisory (AV26-313)
→ No new info (linked only)
Tier B
BSI Advisories51d ago
[NEU] [kritisch] Fortinet FortiClient EMS: Schwachstelle ermöglicht Codeausführung
→ No new info (linked only)
Tier B
CERT-FR51d ago
Vulnérabilité dans Fortinet FortiClientEMS (07 avril 2026)
→ No new info (linked only)
Tier D
Dark Reading51d ago
Fortinet Issues Emergency Patch for FortiClient Zero-Day
→ No new info (linked only)
Tier D
The Record51d ago
Singapore, US warn of latest Fortinet bug being exploited in wild
→ No new info (linked only)
Tier D
BleepingComputer51d ago
CISA orders feds to patch exploited Fortinet EMS flaw by Friday
→ No new info (linked only)
Tier D
The Hacker News52d ago
⚡ Weekly Recap: Axios Hack, Chrome 0-Day, Fortinet Exploits, Paragon Spyware and More
→ No new info (linked only)
Tier D
SecurityWeek52d ago
Fortinet Rushes Emergency Fixes for Exploited Zero-Day
→ No new info (linked only)
Tier D
BleepingComputer52d ago
New FortiClient EMS flaw exploited in attacks, emergency patch released
→ No new info (linked only)
Tier D
Heise Security53d ago
Jetzt updaten! Kritische FortiClient-EMS-Lücke wird attackiert
→ No new info (linked only)
Tier D
Help Net Security53d ago
Week in review: Axios npm supply chain compromise, critical FortiClient EMS bugs exploited
→ No new info (linked only)
Tier D
The Hacker News53d ago
Fortinet Patches Actively Exploited CVE-2026-35616 in FortiClient EMS
→ No new info (linked only)
Tier E
Reddit r/cybersecurity53d ago
Fortinet CVE-2026-35616 Actively Exploited as Zero Day
→ No new info (linked only)
Tier D
Help Net Security54d ago
FortiClient EMS zero-day exploited, emergency hotfixes available (CVE-2026-35616)
→ No new info (linked only)
Tier A
Fortinet PSIRT54d ago
API authentication and authorization bypass
→ No new info (linked only)
Tier C
VulDB54d ago
CVE-2026-35616 | Fortinet FortiClientEMS up to 7.4.6 access control (FG-IR-26-099)
→ No new info (linked only)
CVSS 3.19.1 CRITICAL
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CISA KEV✅ Yes
Actively exploited✅ Yes
Patch available
7.4.7
CWECWE-284, CWE-862
PublishedApr 4, 2026
Last enriched1h agov13
Tags
zero-dayAPI authenticationauthorization bypasspre-authenticationcode executionin-the-wild exploitationgovernment advisoryAPI access bypasselevation of privilegesZero Trust Network Access (ZTNA)ransomwarecyber-espionageinformation stealingmalware deploymentCISA KEV
Trending Score171🔥
Source articles20
Independent13
Info Completeness12/14
Missing: epss, mitre_attack

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Related CVEs (5)

CRITICALCVE-2026-26083
CVE-2026-26083: A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, Fo
Trending: 15
CRITICALCVE-2026-44277EXP
CVE-2026-44277: A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticat
Trending: 12
HIGHCVE-2025-53844EXP
CVE-2025-53844: A out-of-bounds write vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0
Trending: 9
MEDIUMCVE-2025-53681
CVE-2025-53681: An improper neutralization of special elements used in an SQL Command ("SQL Injection&") vulnerability [CWE-89] vulnerab
Trending: 9
MEDIUMCVE-2025-53870EXP
CVE-2025-53870: An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet
Trending: 8

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Verification

State: verified
Confidence: 0%

Vulnerability Timeline

CVE Published
Apr 4, 2026
Added to CISA KEV
Apr 4, 2026
Discovered by ZDM
Apr 4, 2026
Updated: affectedVersions, exploitAvailable, activelyExploited, patchAvailable
Apr 4, 2026
Updated: affectedVersions
Apr 5, 2026
Updated: description, tags
Apr 5, 2026
Updated: description, iocs, tags
Apr 5, 2026
Updated: affectedVersions, patchAvailable
Apr 6, 2026
Updated: tags
Apr 6, 2026
Updated: description, affectedVersions, tags
Apr 6, 2026
Updated: affectedVersions, patchAvailable, tags
Apr 7, 2026
Updated: affectedVersions, patchAvailable, tags
Apr 7, 2026
Updated: cvssEstimate
Apr 13, 2026
Actively Exploited
Apr 21, 2026
Exploit Available
Apr 21, 2026
Patch Available
Apr 21, 2026
Updated: cweIds, tags
May 12, 2026
Updated: description, tags
May 28, 2026

Version History

v13
Last enriched 1h ago
v13Tier D1h ago

Updated description with detailed exploitation methods and added new IoCs and tags related to the information-stealing malware.

descriptiontags
via SecurityWeek
v12Tier D15d ago

Updated description to include active exploitation context and added new CWE IDs and tags related to ransomware and cyber-espionage.

cweIdstags
via BleepingComputer
v11Tier B45d ago

Updated CVSS from 9.1 to 9.8 and noted that the patch is now null.

cvssEstimate
via CERT-FR
v10Tier B50d ago

Added affected version 7.4.7 and updated patch available to 7.4.7, along with a new tag for Zero Trust Network Access (ZTNA).

affectedVersionspatchAvailabletags
via CCCS Canada
v9Tier B51d ago

Updated affected versions to include 7.4.6, added patch version 7.4.6, and included a new tag for elevation of privileges.

affectedVersionspatchAvailabletags
via CERT-FR
v8Tier D51d ago

Updated description with more technical detail, added affected version 7.4.7, and included new tags and IoCs.

descriptionaffectedVersionstags
via BleepingComputer
v7Tier D51d ago

Updated patch availability to 'hotfix' and added new tags related to in-the-wild exploitation and government advisory.

tags
via The Record
v6Tier D52d ago

Added affected version 7.2 and noted that the patch available is now null as hotfixes are provided.

affectedVersionspatchAvailable
via SecurityWeek
v5Tier D52d ago

Updated description with more technical details, added new tags, and confirmed patch version 7.4.7.

descriptioniocstags
via BleepingComputer
v4Tier D53d ago

Updated description with details on the zero-day exploitation and added relevant tags.

descriptiontags
via Help Net Security
v3Tier D53d ago

Updated CVSS from 9.1 to 9.8, added affected version 7.4.6, and confirmed patch available as 7.4.7.

affectedVersions
via Heise Security
v2Tier A54d ago

Added affected version 7.4.6, confirmed active exploitation, and noted patch availability in version 7.4.7.

affectedVersionsexploitAvailableactivelyExploitedpatchAvailable
via Fortinet PSIRT
v154d ago

Initial creation