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CVE-2026-21643

Fortinet FortiClient EMS SQL Injection

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 93.9%
  1. Published6 Feb 2026
  2. Added to CISA KEV13 Apr 2026
  3. Remediation due16 Apr 2026
Actively exploited (CISA KEV)

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.

Added to KEV: 13 Apr 2026Federal remediation due: 16 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fortinet Forticlientems7.4.4

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-21643 being actively exploited?

Yes. CVE-2026-21643 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 13 Apr 2026.

How severe is CVE-2026-21643?

CVE-2026-21643 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 93.9% probability of exploitation.

Which products are affected by CVE-2026-21643?

Affected products include Fortinet Forticlientems.

How do I fix CVE-2026-21643?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-21643 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.