CRITICAL CISA KEV Actively Exploited

CVE-2026-21643

SQL Injection Vulnerability in FortiClientEMS 7.4.4 Allows Unauthenticated Remote Code Execution

CVSS v3

9.8

CRITICAL

EPSS Score

93.9 %

exploit probability, as of 2026-10-21

CISA KEV

Yes

known exploited

Exploitation

active

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-21643 yet.

Full record on NVD

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.

CISA Known Exploited Vulnerability

Date Added: 2026-04-13
Patch Due Date: 2026-04-16
Ransomware Use: Unknown

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-02-06
Last Modified: 2026-04-16

Frequently asked questions

What is CVE-2026-21643?

Is CVE-2026-21643 actively exploited?

Yes. CVE-2026-21643 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-04-16.

What is the CVSS score for CVE-2026-21643?

CVE-2026-21643 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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