Review reviewCritical

CVE-2026-26083

Fortinet FortiSandbox, FortiSandbox PaaS, FortiSandbox Cloud

A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.2 through 5.0.5, FortiSandbox PaaS 23.4 all versions, FortiSandbox PaaS 23.3 all versions, FortiSandbox PaaS 23.1 all versions, FortiSandbox PaaS 22.2 all versions, FortiSandbox PaaS 22.1 all versions, FortiSandbox PaaS 21.4 all versions, FortiSandbox PaaS 21.3 all versions, FortiSandbox PaaS 5.0.0 through 5.0.1, FortiSandbox PaaS 4.4.5 through 4.4.8 may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

CVSS: 9.8
EPSS: 0.73%
CISA KEV: Not listed
Published: 2026.05.13

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.73%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Fortinet FortiSandbox, FortiSandbox PaaS, FortiSandbox Cloud
Affected versions: 5.0.0, 4.4.0, 4.2.1, 23.4.4374, 23.4.4350, 23.3.4329, 23.1.4245, 22.2.4151, 22.2.4134, 22.1.4113, 21.4.4072, 21.3.4055, 4.4.5, >= 4.4.0 < 4.4.9, >= 5.0.0 < 5.0.2, >= 5.0.2 < 5.0.6, >= 23.1.4245 <= 23.4.4374, 24.1.4436, >= 4.4.5 < 4.4.9, >= 21.3.4055 <= 23.4.4374
Fixed versions: 4.4.9, 5.0.2, 5.0.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Fortinet FortiSandbox, FortiSandbox PaaS, FortiSandbox Cloud and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-862