CVEs / CVE-2026-21643
CVE-2026-21643: Fortinet FortiClient EMS SQL Injection Vulnerability
- Known exploited in the CISA KEV catalog since 13 Apr 2026
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 97.7% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Fortinet FortiClientEMS | 7.4.4 | — |
Exploitation
| In CISA KEV since | 13 Apr 2026 |
|---|---|
| Due date for US federal agencies | 16 Apr 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-89 |
References
- CVE-2026-21643 on NVD
- CVE-2026-21643 in the CISA KEV catalog
- https://fortiguard.fortinet.com/psirt/FG-IR-25-1142 (cited by CISA)
- https://fortiguard.fortinet.com/psirt/FG-IR-25-1142 Vendor Advisory
- https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py Exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.