CVE-2026-21643KEV · OVERDUECWE-89

Fortinet FortiClient EMS SQL Injection Vulnerability

Critical · published February 6, 2026

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.1. It is confirmed in active exploitation. It sits in the 99.8th percentile for exploit probability.

191
days past CISA
deadline
CVSS v3.1
9.1
EPSS
94%
Percentile
99.8
In the wild
Confirmed
What it is

🚨 Unauthenticated SQL injection? You bet! An attacker can exploit Fortinet FortiClientEMS 7.4.4 with crafted HTTP requests to execute unauthorized commands! 🔥 Think of it as a restaurant where the chef prepares food based on any random order someone shouts from outside — if the kitchen doesn't verify the order, someone could request a whole feast without ever stepping in! This could lead to a complete takeover of your FortiClientEMS system, allowing attackers to execute arbitrary code, steal sensitive data, or even disrupt operations. It’s a gaping security hole that could lead to absolutely devastating consequences for your organization!

Put simply

Think of it as a restaurant where the chef prepares food based on any random order someone shouts from outside — if the kitchen doesn't verify the order, someone could request a whole feast without ever stepping in! This is a classic SQL injection vulnerability where the application fails to properly neutralize special characters used in SQL commands. By sending well-crafted HTTP requests, an attacker can manipulate database queries and gain unauthorized access to the system.

What to do

This could lead to a complete takeover of your FortiClientEMS system, allowing attackers to execute arbitrary code, steal sensitive data, or even disrupt operations. It’s a gaping security hole that could lead to absolutely devastating consequences for your organization! Immediately patch to FortiClientEMS version 7.4.5 or later to close this vulnerability. It's critical to also review your input validation processes to ensure no unexpected commands can slip through. Don't forget to audit your existing systems for any unauthorized access! You've got this! Follow these steps and you'll be well on your way to securing your systems! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.93871 · 99.8th percentile
Weakness
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Published
2026-02-06T08:24Z
KEV added
2026-04-13 · due 2026-04-16
EPSS history
Timeline
  • 13 APR 00:00Z
    Added to CISA KEV — remediate by Apr 16
    kev
  • 06 FEB 08:24Z
    An improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.4 may allow an…
    cvelistv5