CVE-2024-21756Network attack vector

Authenticated command execution via crafted requests

Published Apr 9, 2024 · Updated Jan 14, 2026

OS command injection in Fortinet FortiSandbox allows remote authenticated users to execute commands through crafted network requests. Fortinet has not disclosed the affected request handler, parameter, or shell-command construction error beyond improper neutralization of command elements. A low-privileged account and network access to the affected interface are required, after which injected commands run with the application's authority.

CVSS severity8.8
High
EPSS probability2.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Fortinet FortiSandbox allows remote authenticated users to execute commands through crafted network requests. Fortinet has not disclosed the affected request handler, parameter, or shell-command construction error beyond improper neutralization of command elements. A low-privileged account and network access to the affected interface are required, after which injected commands run with the application's authority.

The record

CVE
CVE-2024-21756
Published
Apr 9, 2024
Updated
Jan 14, 2026
Vendor
Fortinet
Product
FortiSandbox
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0 <=4.0.4
  2. Affected versionversion=4.2.0 <=4.2.6
  3. Affected versionversion=4.2.1 <=4.2.6
  4. Affected versionversion=4.4.0 <=4.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fortinet · FortiSandboxversion=4.0.0 <=4.0.4; version=4.2.0 <=4.2.6; version=4.2.1 <=4.2.6; version=4.4.0 <=4.4.3

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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