CVE-2026-59835
HighCVSS 8.6Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
A vulnerability in Fortinet FortiSandbox versions 5.0.0-5.0.2 and 4.4.3-4.4.8 allows an unauthenticated attacker to access the VNC server of scanning VMs. The issue is due to improper resource access restrictions.
Risk Assessment
An attacker could take control of virtual machines used for threat analysis, leading to data leakage or manipulation of scan results.
Recommendation
Immediately upgrade FortiSandbox to version 5.0.3 or later (for 5.0.x branch) and 4.4.9 or later (for 4.4.x branch).
Other vulnerabilities in FortiSandbox
See all- CVE-2026-25089CriticalActively exploited
An OS command injection vulnerability in Fortinet FortiSandbox (versions 5.0.0-5.0.5, 4.4.0-4.4.8, 4.2 all, FortiSandbox Cloud 5.0.4-5.0.5, FortiSandbox PaaS 5.0.4-5.0.5). An unauthenticated attacker can execute unauthorized commands via crafted HTTP requests.
- CVE-2026-26083Critical
A missing authorization vulnerability in Fortinet FortiSandbox allows an unauthenticated attacker to execute unauthorized code or commands via HTTP requests. The issue affects multiple versions of FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS.
- CVE-2026-39808CriticalActively exploited
An OS command injection vulnerability has been discovered in Fortinet FortiSandbox versions 4.4.0 through 4.4.8. This flaw is due to improper neutralization of special elements used in OS commands.
Original NVD description (English source)
A exposure of resource to wrong sphere vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.3 through 4.4.8 may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests.