CVEs / CVE-2026-25089
CVE-2026-25089: Fortinet FortiSandbox OS Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 16 Jul 2026
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 76.1% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Fortinet FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS contain an OS command injection vulnerability that allows an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.
Description
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
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Fortinet FortiSandbox | from 5.0.0, up to and including 5.0.5 | — |
| Fortinet FortiSandbox | from 4.4.0, up to and including 4.4.8 | — |
| Fortinet FortiSandbox | from 4.2.1, up to and including 4.2.8 | — |
| Fortinet FortiSandbox Cloud | from 5.0.4, up to and including 5.0.5 | — |
| Fortinet FortiSandbox PaaS | from 5.0.4, up to and including 5.0.5 | — |
Exploitation
| In CISA KEV since | 16 Jul 2026 |
|---|---|
| Due date for US federal agencies | 19 Jul 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-78 |
References
- CVE-2026-25089 on NVD
- CVE-2026-25089 in the CISA KEV catalog
- https://fortiguard.fortinet.com/psirt/FG-IR-26-141 (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://fortiguard.fortinet.com/psirt/FG-IR-26-141 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-25089 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.