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CriticalKEV

CVE-2026-21643 — Fortinet FortiClient EMS SQL Injection Vulnerability

CVE-2026-21643 · FortiClient EMS · CVSS 9.8 · KEV

In brief

Severity · CVSS
Critical9.8CVSS 3.1, Critical
EPSS
94%
CISA KEV
Known exploited, listed since 13 Apr 2026
Vendor
Fortinet
Published · Modified
·
Last verified

Summary

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.

Weakness: CWE-89

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

1 branch with a published fixed release

Fortinet FortiClientEMS

Source: FG-IR-25-1142CVE-2026-21643

  1. 8.0
    Affected versionsNot affected
    First fixed release—
  2. 7.4
    Affected versions7.4.4
    First fixed release7.4.5
  3. 7.2Approaching end of support
    Affected versionsNot affected
    First fixed release—

Releases the vendor does not list are not affected.

Remediation

Fix available

Vendor fix

  • FortiClientEMS 7.47.4.5

Upgrade to a fixed release listed above for your branch, or to a later fixed release the vendor explicitly supports.

Upgrade to upcoming FortiClientEMS version 8.0.0 or above Upgrade to FortiClientEMS version 7.4.5 or above

SourceFortinet (CVE record)

SourceFortiGuard FG-IR-25-1142

CISA KEV 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.

CISA due date:

SourceCISA KEV

CERT-FR recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

SourceCERTFR-2026-AVI-0136

Last verified 1 Oct 2026 at 09:31 UTC

Known exploitation

Added to CISA KEV on 13 Apr 2026

Federal remediation due date: 16 Apr 2026

The CISA required action is shown under Remediation.

94% probability of exploitation in the next 30 days (percentile 100%).

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

CERT-FR

1 document of the French national CERT (ANSSI) references this CVE.

Advisory (AVI)CERTFR-2026-AVI-0136Published 9 Feb 2026

Vulnerability in Fortinet FortiClientEMS

SQL injection (SQLi)

Summary

A vulnerability has been discovered in Fortinet FortiClientEMS. It allows an attacker to cause a SQL injection (SQLi).

Recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

Official document on cert.ssi.gouv.frread by Patcharo 28 Sept 2026 at 20:04 UTCMachine translation of the French text published by CERT-FR; a text whose translation did not pass Patcharo's checks stays in French. Identifiers, versions and links are copied unchanged.

Timeline

  1. Published by the source
  2. Added to CISA KEV
  3. CISA remediation due date
  4. Source record last modified
  5. EPSS score computed
  6. Last verified by Patcharo

Official sources

References

Known exploited

Fortinet · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS · FortiGuard FG-IR-25-1142

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: FortiOS version numbering: branches, patch releases and the Feature and Mature labels

Related vulnerabilities

Other records affecting the same products, newest first.

  • CVE-2026-35616Fortinet FortiClient EMS Improper Access Control VulnerabilityCriticalKEV
  • CVE-2023-48788Fortinet FortiClient EMS SQL Injection VulnerabilityCriticalKEVRansomware

All FortiClient EMS vulnerabilitiesAll Fortinet vulnerabilities