CVE-2026-25089

Published Jun 9, 2026

Last updated 9 days ago

Exploit known CVSS critical 9.8

Zero-day

Fortinet FortiSandbox

FortiSandbox Cloud

FortiSandbox PaaS

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-25089 is an operating system (OS) command injection vulnerability affecting Fortinet FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS. This flaw, categorized as CWE-78 (Improper Neutralization of Special Elements used in an OS Command), allows an unauthenticated, remote attacker to execute unauthorized commands on the appliance. The vulnerability is triggered by sending specially crafted HTTP requests, specifically exploiting a second-order command injection within the JSON input of the "start VNC" feature in the web-based management interface. Successful exploitation of CVE-2026-25089 can lead to the execution of arbitrary OS commands on the underlying system. Affected versions include FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, all FortiSandbox 4.2 versions, FortiSandbox Cloud 5.0.4 through 5.0.5, and FortiSandbox PaaS 5.0.4 through 5.0.5.

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
Source: psirt@fortinet.com
NVD status: Analyzed
Products: fortisandbox, fortisandbox_cloud, fortisandbox_paas

Risk scores

CVSS 3.1

Type: Secondary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: Fortinet FortiSandbox OS Command Injection Vulnerability
Exploit added on: Jul 16, 2026
Exploit action due: Jul 19, 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.

Weaknesses

psirt@fortinet.com: CWE-78

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "814D77BE-F536-42DE-B068-F92B95D68248",
            "versionEndIncluding": "4.2.8",
            "versionStartIncluding": "4.2.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "0025C9C0-8D61-4563-96F9-F4E09DD83B26",
            "versionEndExcluding": "4.4.9",
            "versionStartIncluding": "4.4.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "3AAEF316-2134-4398-911C-E7532CD3AFF2",
            "versionEndExcluding": "5.0.6",
            "versionStartIncluding": "5.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:fortinet:fortisandbox_cloud:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "D479507F-4DD8-4455-A8DB-138AD56C6822",
            "versionEndExcluding": "5.0.6",
            "versionStartIncluding": "5.0.4",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:fortinet:fortisandbox_paas:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "61A9A2E9-3086-4172-B3A3-212873B8C4A9",
            "versionEndExcluding": "5.0.6",
            "versionStartIncluding": "5.0.4",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.