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CVE-2026-21643

CriticalPublished

Fortinet FortiClient EMS SQL Injection Vulnerability

Published: Feb 6, 2026
Updated: Apr 14, 2026
Assigning CNA: fortinet
Evidence observed: Apr 13, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

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

EPSS probability estimate

94.1%

High · next 30 days

Percentile: 99.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

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.

Sources

CVE-2026-21643Informational
CVE-2026-21643
CVE-2026-21643PoC
Python PoC and Nuclei template for detecting pre-authentication SQL injection in FortiClient EMS 7.4.4, with safe error-based and time-based check methods.
CVE-2026-PoCsResearch
A community-curated, verified collection of Proof-of-Concept exploits for CVEs disclosed in 2026.

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