Actively exploited · Published Jun 9, 2026 · Assigned by fortinet
CVE-2026-25089
Critical 9.1 Exploited
In plain English
A critical-severity OS command injection in FortiSandbox from Fortinet. Attackers are actively exploiting it in the wild (listed by CISA on July 16, 2026). The chance it is exploited in the next 30 days is estimated at 76.1% (higher than 99.5% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. 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.
CISA guidance
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.
Federal agencies must remediate by Jul 19, 2026.
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiSandbox | 5.0.0 – through 5.0.54.4.0 – through 4.4.84.2.1 – through 4.2.8 |
| Fortinet | FortiSandbox Cloud | 5.0.4 – through 5.0.5 |
| Fortinet | FortiSandbox PaaS | 5.0.4 – through 5.0.5 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C