Fortinet FortiClient EMS's SQL Injection Allows Unauthenticated Attackers to Execute Unauthorized Code via Crafted HTTP Requests; CISA's April 16th KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-21643

Key Details

CVE	CVE-2026-21643
Vulnerability Name	Fortinet FortiClient EMS SQL Injection Vulnerability
Affected products	Fortinet FortiClient EMS
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-89 (Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'))
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-04-13.
Exploitation prediction (EPSS)	93.72% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-04-16 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
Fortinet	FortiClient EMS

Vendor

Product

Affected Versions

Patch Status

Fortinet

FortiClient EMS

Subsystems	General OT
Sectors	Multiple

What to Know

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

Monitor Fortinet's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-21643
CVE	https://www.cve.org/CVERecord?id=CVE-2026-21643

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-21643

CVE

https://www.cve.org/CVERecord?id=CVE-2026-21643

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-04-13
Required Action Due Date	2026-04-16
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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-04-13

Required Action Due Date

2026-04-16

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.