CVE-2026-21643
Fortinet FortiClient EMS SQL Injection Vulnerability
- Published
- Feb 6, 2026
- Updated
- Apr 14, 2026
- Assigning CNA
- fortinet
- Evidence observed
- Apr 13, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.8%
- Model date
- Oct 17, 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
http/cves/2026/CVE-2026-21643.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: dsl($.matchers[*].type)
- CVE-2026-21643Informational
CVE-2026-21643
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.
Responsible use
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