Fortinet FortiSandbox OS Command Injection Vulnerability
- Severity
- Critical9.8CVSS 3.1, Critical
- EPSS
- 76%
- Published
- 9 Jun 2026
- Updated
- 23 Jul 2026
Description
Title, description and vendor guidance are quoted from the source records.
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox 4.2 all versions, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests
Weakness: CWE-78
Known exploited
Added to CISA KEV on 16 Jul 2026
Federal remediation due date: 19 Jul 2026
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Exploit prediction
76% probability of exploitation in the next 30 days (percentile 100%).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What the source states, per branch
Versions matched by Patcharo
Fortinet FortiSandboxSource: Fortinet (CVE record)
| Branch | Affected | Fixed in |
|---|---|---|
| 5.0 | 5.0.0 – 5.0.5 | Fixed after 5.0.5 |
| 4.4 | 4.4.0 – 4.4.8 | Fixed after 4.4.8 |
| 4.2 | 4.2.1 – 4.2.8 | Fixed after 4.2.8 |
Versions not listed are stated unaffected by the vendor.
Affected products
- Fortinet FortiSandbox Cloud · 5.0.4 ≤ 5.0.5
- Fortinet FortiSandbox PaaS · 5.0.4 ≤ 5.0.5
Workaround / Vendor remediation
Vendor remediation · FortiSandbox
Upgrade to upcoming FortiSandbox version 5.2.0 or above Upgrade to FortiSandbox version 5.0.6 or above Upgrade to FortiSandbox version 4.4.9 or above Upgrade to upcoming FortiSandbox PaaS version 5.2.0 or above Upgrade to FortiSandbox PaaS version 5.0.6 or above Fortinet remediated this issue in FortiSandbox Cloud version 5.2.0 (not released) and hence customers do not need to perform any action. Fortinet remediated this issue in FortiSandbox Cloud version 5.0.6 (not released) and hence customers do not need to perform any action.
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Fortinet (CVE record)
- Fortinet (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 27 Sept 2026, 23:42 UTC · Parser patcharo-kev/1.0.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC