ZDI-26-645: Fortinet FortiSandbox write_remote_backup_to_crontab cronValue Command Injection Remote Code Execution Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Sep 9, 2026 · Catalog

   Detected

   This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fortinet FortiSandbox. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-84387.

Sources

• CVE.orgVulnerability recordCVE-2026-84387

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-84387

  30-day exploitation probability 1.4%

  first.org
• Zero Day InitiativeCoordinated disclosureZDI-26-645

  This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fortinet FortiSandbox. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-84387.

  zerodayinitiative.com