Fortinet · FortiClient EMS
CVE-2026-21643
Fortinet FortiClient EMS SQL Injection Vulnerability
What it is
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.
CISA: 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.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: April 16, 2026
- Added to the CISA list
- April 13, 2026
- Published
- February 6, 2026
- Severity
- Critical 9.1 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 98% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-89
- More details
- NVD · CVE.org · CISA
All references (1)
More exploited flaws from Fortinet
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Apr 6, 2026 | Improper Access Control | FortiClient EMS | Critical 9.1 | 94% |
| Mar 25, 2024 | SQL Injection | FortiClient EMS | Critical 9.3 | 98% |
| Oct 16, 2026 | Path Traversal | Multiple Products | Medium 5.4 | 1.3% |
| Oct 1, 2026 | Path Traversal | FortiMail | Critical 9.8 | 4.6% |
| Sep 9, 2026 | Heap-based Buffer Overflow | Multiple Products | High 7.4 | 3.7% |
| Jul 27, 2026 | Exposure of Sensitive Information to an Unauthorized Actor | FortiOS | Medium 5.3 | 29% |
| Jul 16, 2026 | OS Command Injection | FortiSandbox | Critical 9.1 | 76% |
| Jul 16, 2026 | OS Command Injection | FortiSandbox | Critical 9.1 | 93% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.