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Fencer Vulns
critical 9.8

CVE-2026-21643 kev in the critical feed json

An improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.4 may…

published 2026-02-06 9 mo ago modified 2026-11-06 2 d ago also EUVD-2026-5681

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2026-04-13
epss
97.7%
EPSS 97.7% chance of exploitation in 30 days, percentile 99.9%
public exploits
0
none known, plus a Nuclei check

Summary

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.

Patch / fix

cisa 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.

Timeline

  1. CISA SSVC: exploitation active
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline

Known exploited

Added
6 mo ago
Patch by
2026-04-16 (6 mo ago)
Ransomware
Not known
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.
Vendor, product
Fortinet, FortiClient EMS
CISA name
Fortinet FortiClient EMS SQL Injection Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
9 mo ago

Exploit prediction

97.73% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Fortinet FortiClientEMS 7.4.4 - SQL Injection nuclei detection template
  • github.com https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Fortinet FortiClientEMS

Classification

Weakness
  • CWE-89 Improper Neutralization of Special Elements used in an SQL Command
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.