CVE-2026-21643

CRITICAL9.8

CISA KEV

Published 2026-02-06 · Updated 2026-06-17 · Source psirt@fortinet.com

Summary

CVE-2026-21643 is a critical-severity (CVSS 9.8) vulnerability in Fortinet FortiClient EMS. CISA added it to the Known Exploited Vulnerabilities catalog on April 13, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 16, 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

An improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.4 may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

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

CWE-89

CISA Known-Exploited Vulnerability

Product: Fortinet — FortiClient EMS

Name: Fortinet FortiClient EMS SQL Injection Vulnerability

Date added: 2026-04-13 · Due: 2026-04-16

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.

References

View on NVD

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