CVE-2026-21643

Fortinet FortiClientEMS

Published 6 Feb 2026 · updated 17 Jun 2026 · Analyzed

9.8 Critical · CVSS 3.1, fortinet.com

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 13 Apr 2026, with a remediation deadline of 16 Apr 2026 for US federal agencies.

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.

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.

References

fortiguard.fortinet.com/psirt/FG-IR-25-1142 · Vendor Advisory
github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py · Exploit
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643 · US Government Resource