CVE-2026-25089: Fortinet FortiSandbox OS Command Injection Vulnerability
Vulnerability summary
CVE-2026-25089 is a critical (CVSS 9.8) OS Command Injection vulnerability in Fortinet FortiSandbox. It is known to be exploited: CISA lists it, first on 16-07-2026. EPSS estimates a 76.11% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities.
Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 16-07-2026Added to CISA KEVFortinet FortiSandbox OS Command Injection Vulnerability
- 17-07-2026Last modifiedVulnerability information updated.
- 19-07-2026CISA remediation dueApply mitigations per vendor instructions.
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
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:CDiffers
EPSS trend
Probability
76.11%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
0.00 pp
From 76.11% on 19-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 16-07-2026
- Federal due date
- 19-07-2026
CISA 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. fortiguard.fortinet.com/psirt/FG-IR-26-141 nvd.nist.gov/vuln/detail/CVE-2026-25089
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Fortinet3 products
- fortisandbox≥ 5.0.0, ≤ 5.0.5 | ≥ 4.4.0, ≤ 4.4.8 | ≥ 4.2.1, ≤ 4.2.8 | ≥ 4.2.0, ≤ 4.2.8 | ≥ 4.4.0, < 4.4.9 | ≥ 5.0.0, < 5.0.6
- fortisandbox_cloud≥ 5.0.4, ≤ 5.0.5 | ≥ 5.0.4, < 5.0.6
- fortisandbox_paas≥ 5.0.4, ≤ 5.0.5 | ≥ 5.0.4, < 5.0.6
1 vendor · 3 products
References
2 links- fortiguard.fortinet.com/psirt/FG-IR-26-141Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-25089Government ResourceUS Government Resource