CVE-2026-21643

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 93.87%
EPSS Percentile: 99.85%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: psirt@fortinet.com
Published: 06-Feb-2026 16:15
Last Modified: 17-Jun-2026 17:18
EPSS Date: 2026-10-16
CWE: CWE-89

CVSS Vector


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

CISA KEV Details

Date Added: 2026-04-13
Remediation Due: 2026-04-16
Known Ransomware Campaign Use: Unknown
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.
Notes: https://fortiguard.fortinet.com/psirt/FG-IR-25-1142 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21643

Affected Products / Versions

fortinet / forticlientems
Version / affected range: 7.4.4
cpe:2.3:a:fortinet:forticlientems:7.4.4:*:*:*:*:*:*:*

References

Last enrichment sync: 17-Oct-2026 08:34
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

FortiClient EMSVulnerabilities observed in active exploitation campaigns:CVE-2026-21643 FortiBleed Campaign Reportedly Compromises Fortinet Firewalls and VPN Gateways Worldwide

CVE (3)

MITRE ATT&CK (6)

Vendors (1)

Products (3)

Tools (1)

Industries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.