Risk Letters

Exploited vulnerability

CVE-2026-39808

TLP:CLEAR

Fortinet FortiSandbox OS Command Injection Vulnerability

Fortinet FortiSandbox contains an OS command injection vulnerability that could allow an unauthenticated attacker to execute unauthorized code or commands via crafted HTTP requests.

Facts

  • Vendor: Fortinet
  • Product: FortiSandbox
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 93.2 %
  • On CISA's Known Exploited Vulnerabilities list since: 16 July 2026
  • First known exploitation: 16 July 2026
  • CISA's deadline for US federal agencies: 19 July 2026
  • Weakness: CWE-78
  • First seen by Risk Letters: 14 April 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD