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Fortinet CVE-2026-21643

CRITICAL
SQL Injection (CWE-89)
2026-02-06 psirt@fortinet.com
9.8
CVSS 3.1 · NVD
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Send crafted HTTP request with SQL injection payload
  2. Delivery
    Bypass input validation in query parser
  3. Exploit
    Execute arbitrary SQL commands
  4. Execution
    Extract sensitive data or modify database
  5. Impact
    Achieve remote code execution

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Parameterized queries, prepared statements
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Persistence

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No special conditions — remote unauthenticated exploitation against FortiClientEMS 7.4.4 default configurations. Vulnerable endpoint accepts HTTP requests without authentication or input sanitization on SQL query parameters.

Impact

CVSS 9.8 — standard unauthenticated SQL injection.

Exploit ScenarioDerived

An attacker injects SQL commands to extract database contents.

Emergency Immediate action required. Why: CRITICAL + in CISA KEV (actively exploited), no patch available.
Exploited in the wild (CISA KEV) No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

A product has a SQL injection vulnerability enabling unauthenticated database compromise through improperly neutralized SQL commands.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 21:54 CVSS 9.8

SQL injection enables unauthenticated database compromise.

RemediationAI

Apply vendor patches. Use parameterized queries.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-89 SQL injection through unsanitized input parameters.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ENISA EUVD HIGH

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Added to CISA KEV
Apr 13, 2026 - 18:02 CISA
CVE Published
Feb 06, 2026 - 09:15 nvd
CRITICAL 9.8

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

A critical SQL injection vulnerability in FortiClientEMS 7.4.4 allows unauthenticated attackers to execute arbitrary code without authentication or user interaction. This poses immediate risk to organizations using this endpoint management platform, potentially compromising all managed devices and sensitive corporate data at scale.

Business Impact: Severe
Compensating Controls

Until patch availability: (1) Restrict network access to FortiClientEMS console via firewall rules and VPN-only connectivity; (2) Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP requests; (3) Disable remote/external access to FortiClientEMS if not business-critical; (4) Implement strict input validation and rate limiting on FortiClientEMS endpoints; (5) Enable enhanced logging and real-time monitoring for suspicious database queries and HTTP requests; (6) Consider running FortiClientEMS behind a reverse proxy with SQL injection protection. Monitor vendor security advisories daily for patch release.

Threat Intelligence Overview

Threat Score
5.0/10
Composite threat intelligence
EPSS Score
0.0%
Top 86% exploitable
Threat Intel
1
1 sources
Exploit
POC
Public exploit code exists
Data Quality
7 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV Yes
Public POC Yes
EPSS 0.0%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + in CISA KEV (actively exploited), no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Immediate
Exploitation· derived
Active
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Very High

Priority Score

124
Low Medium High Critical
KEV: +50
EPSS: 0
CVSS: +49
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: +5

Attack Technique

SQL injection exploits the way applications construct database queries by mixing user input directly into SQL statements.

Affected Products (CPE)CVE.org

cpe:2.3:a:fortinet:forticlientems:*:*:*:*:*:*:*:*
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