Posting Date: 2026/04/29

【Vulnerability Alert】Critical Security Vulnerability Found in Fortinet FortiSandbox (CVE-2026-39808)

  • Subject: 【Vulnerability Alert】Critical Security Vulnerability Found in Fortinet FortiSandbox (CVE-2026-39808)


  • Description:
    • Forwarded from TWCERT/CC Security Alert TWCERTCC-200-202604-00000011.
    • FortiSandbox is a threat protection solution by Fortinet that performs dynamic analysis to identify previously unknown network threats. Fortinet has released a report regarding a critical security vulnerability in FortiSandbox (CVE-2026-39808, CVSS: 9.8). This is an OS command injection vulnerability that allows unauthenticated attackers to execute unauthorized code or commands via specially crafted HTTP requests.
  • Affected Platforms:
    • FortiSandbox versions 4.4.0 through 4.4.8 (inclusive)
  • Recommended Actions:
    • Please update to FortiSandbox version 4.4.9 or later.
  • Reference:
    1. https://www.twcert.org.tw/tw/cp-169-10837-5fade-1.html

Computer and Communication Center
Network Systems Division