CVE-2026-21643

KEVFortinet FortiClient EMS SQL Injection Vulnerability

Description

Fortinet FortiClient EMS contains a SQL injection vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

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

PublishedFeb 6, 2026

Last modifiedJun 17, 2026

Added to KEVApr 13, 2026

Remediation dueApr 16, 2026

References

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

0 recent articles mention this CVE

Risk assessment · Critical

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 194 days
CVSS: 9.8 CRITICAL
EPSS (30-day exploit probability): 97.7% · top 1% of all CVEs
Weakness: CWE-89
Attack vector: Network, remotely reachable
Preconditions: No privileges and no user interaction

Recommended actions

1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.