Is CVE-2024-21756 being actively exploited?

CVE-2024-21756 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2024-21756?

CVE-2024-21756 has a CVSS 3.1 base score of 8.8 (HIGH).

CVE-2024-21756

HIGH · CVSS 8.8EPSS 2.2%EU EUVD

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.3, FortiSandbox 4.2.1 through 4.2.6, FortiSandbox 4.0.0 through 4.0.4 allows attacker to execute unauthorized code or commands via crafted requests..

Key facts

CVSS score: 8.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
EPSS score: 2.2% (82th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2024-19370)
Published: April 9, 2024
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2024-19370 in the EU Vulnerability Database. Last updated in EUVD on January 14, 2026.

View on the EU Vulnerability Database

Affected products

fortinet / fortisandbox

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

FortiSandbox 4.4 - Fortinet, Inc. - Common Criteria CCEVS-VR-VID-11636-2025 - active

References

https://fortiguard.com/psirt/FG-IR-23-489(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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