CVE-2026-21643
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Weaknesses
Affected Products
Fortinet
commercial·USaka forti net
Fortinet Inc.
commercial·USaka fortinet
and 1 more affected products View all →
Exploitability
CISA Known Exploited Vulnerability
Added to KEV:Apr 13, 2026
Remediation due:Apr 16, 2026
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.
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
1 technique Initial Access
References
https://fortiguard.fortinet.com/psirt/FG-IR-25-1142
fortiguard.fortinet.com
https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py
github.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643
cisa.gov
and 1 more references View all →
News mentions
6- Medusa ransomware gang has hit over 500 organizations, CISA warnsen-us·Help Net Security· Exploited ScreenConnect Medusa
- CISA urges immediate action on actively exploited Fortinet flawsen-us·BleepingComputer· Exploited FortiSandbox rce
- 3 Recently Patched Fortinet FortiSandbox Vulnerabilities in Hacker Crosshairsen-us·SecurityWeek· Exploited FortiSandbox rce
- Critical Fortinet FortiSandbox flaws now exploited in attacksen-us·BleepingComputer· Exploited FortiSandbox rce
- API Authentication Bypass in FortiClient EMS 7.4.5-7.4.6–CVE-2026-35616en-us·Bishop Fox· Exploited FortiClient EMS auth-bypass
- Pre-Authentication SQL Injection in FortiClient EMS 7.4.4 - CVE-2026-21643en-us·Bishop Fox· Exploited FortiClient EMS network-edge
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