PSIRT Unauthenticated VNC access exposed on all interfaces

{
  "id": "a505ff5e70d24451014bd47bedd21d84b7467b91157d497ae2e64eef8c8397e7",
  "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-145",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "PSIRT Unauthenticated VNC access exposed on all interfaces",
    "summary": "An unauthenticated attacker may access VNC servers of FortiSandbox VMs performing scanning. FortiSandbox 5.0.0 through 5.0.2 and 4.4.3 through 4.4.8 are affected; upgrade to 5.0.3 or above and 4.4.9 or above, respectively. FortiSandbox 5.2 is not affected, and FortiSandboxPaaS is not impacted.",
    "evidence": "An Exposure of Resource to Wrong Sphere vulnerability [CWE-668] in FortiSandbox may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests.",
    "products": [
      {
        "name": {
          "value": "FortiSandbox",
          "evidence": "FortiSandbox 5.0"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.0.3 or above",
            "evidence": "FortiSandbox 5.0 5.0.0 through 5.0.2 Upgrade to 5.0.3 or above"
          }
        ],
        "affected_versions": [
          {
            "value": "5.0.0 through 5.0.2",
            "evidence": "FortiSandbox 5.0 5.0.0 through 5.0.2 Upgrade to 5.0.3 or above"
          }
        ]
      },
      {
        "name": {
          "value": "FortiSandbox",
          "evidence": "FortiSandbox 4.4"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.4.9 or above",
            "evidence": "FortiSandbox 4.4 4.4.3 through 4.4.8 Upgrade to 4.4.9 or above"
          }
        ],
        "affected_versions": [
          {
            "value": "4.4.3 through 4.4.8",
            "evidence": "FortiSandbox 4.4 4.4.3 through 4.4.8 Upgrade to 4.4.9 or above"
          }
        ]
      },
      {
        "name": {
          "value": "FortiSandbox",
          "evidence": "FortiSandbox 5.2 Not affected"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "FortiSandboxPaaS",
          "evidence": "FortiSandboxPaaS is not impacted"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-59835",
        "evidence": "CVE ID CVE-2026-59835"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "Severity High"
  },
  "source_id": "official-fortinet-psirt",
  "document_id": 23592,
  "published_at": "2026-07-14T07:00:00+00:00"
}