CVE-2026-21643

Name: CVE-2026-21643
Creator: NVD / NIST
Published: 2026-02-06T09:15:49.33+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 94.08%

Last modified Jun 17, 2026

CVE-2026-21643 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 94.08% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

94.08%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 16, 2026.

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Fortinet	Forticlientems	7.4.4

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-1142Vendor Advisory
https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.pyExploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643US Government Resource

Timeline

Published: Feb 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-21643?

How severe is CVE-2026-21643?

CVE-2026-21643 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 94.08% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2026-21643?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21643?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST