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Vulnerabilities

Vulnerability · CVE-2026-21643

Fortinet FortiClient EMS SQL Injection Vulnerability

Published Feb 6, 2026 · catalog updated Jun 17, 2026 · Fortinet FortiClient EMS

Patch now

CVE-2026-21643 is in the CISA known-exploited catalog, due Apr 16, 2026. Confirm Fortinet FortiClient EMS against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
93.87%
Remediation
Remediation guidance
Affected products
cpe fortinet/forticlientems · vendor Fortinet FortiClient EMS

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe fortinet/forticlientems7.4.4
  • vendor Fortinet FortiClient EMSversion unspecified

How to fix CVE-2026-21643

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-21643 is in the CISA known-exploited catalog, due Apr 16, 2026. Confirm Fortinet FortiClient EMS against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 7.4.4. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-89: SQL Injection. EPSS 93.87%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Fortinet security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 6, 2026 · Catalog

    Detected

    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.

  2. Apr 13, 2026 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. Apr 16, 2026 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Jun 17, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2026-21643

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2026-21643

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-21643

    30-day exploitation probability 93.9%

    first.org
  • NIST NVDVulnerability recordCVE-2026-21643

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2026-21643

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.