CVE-2026-21643

CRITICAL CISA KEV EPSS 99.8%
Published Feb 6, 20264mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 6, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Apr 13, 2026 2mo ago
KEV Due Apr 16, 2026 74d overdue

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 Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

CISA Known Exploited Overdue 74d
Added
Apr 13, 2026
Due
Apr 16, 2026

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

EPSS Exploit Probability
99.8% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-89 SQL Injection Injection

Affected Products 1

VendorProductVersionRange
fortinetforticlientems7.4.4any

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.