CVE-2026-21643

Fortinet FortiClient EMS: SQL Injection

As of , CVE-2026-21643 in Fortinet FortiClient EMS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 13 April 2026
US federal deadline
16 April 20263 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.94Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: fortiguard.fortinet.comLinks below, from CISA's entry.

What CISA says to do

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

CISA's required action

What the flaw is

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's 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.

The CVE record's description, from fortinet

CVE published
6 February 2026
Assigned by
fortinet
CVSS
9.1 Critical (CVSS 3.1, from the CNA)
CWE-89
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. CISA changed its entry. Edited: name.
  4. The US federal deadline to fix it.

FortiClient EMS: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2023-48788SQL InjectionFortinet FortiClient EMSPatch this weekRansomware use; Metasploit module; EPSS 0.980.98
CVE-2026-35616Improper Access ControlFortinet FortiClient EMSPatch soon0.09

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