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Sandbox evasion in Fortinet FortiSandbox
CVE-2025-46215 is an improper isolation or compartmentalization vulnerability in Fortinet FortiSandbox. According to the provided content, affected versions are FortiSandbox 5.0.0 through 5.0.1, 4.4.0 through 4.4.7, all 4.2 versions, and all 4.0 versions. The flaw may allow an unauthenticated attacker to evade sandbox scanning by supplying a crafted file. Based on the available information, the issue lies in the sandbox's isolation/compartmentalization controls, enabling malicious content to avoid or bypass expected analysis rather than being fully detonated or inspected within the sandboxed environment.
What it means and what to do now: patch path, interim mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
Successful exploitation may allow malicious files to bypass FortiSandbox analysis and therefore avoid detection during sandbox scanning. This can reduce the effectiveness of malware inspection workflows, allowing malicious payloads to be misclassified as benign or insufficiently analyzed, which may in turn enable downstream delivery of malware into protected environments. The provided content does not indicate direct code execution on the FortiSandbox appliance itself, but it does indicate loss of security control effectiveness through sandbox evasion.
If you can’t patch tonight, do this now.
If immediate patching is not possible, treat FortiSandbox verdicts for untrusted or high-risk file types with additional scrutiny and layer detections with other security controls such as endpoint protection, email/web filtering, and network-based malware detection. Restrict exposure of file submission paths to trusted workflows where possible, monitor for suspicious files that appear to pass sandboxing unexpectedly, and use defense-in-depth controls and network segmentation as recommended in the advisory context. Specific vendor-supplied workaround details are not provided in the content.
Patch, then assume compromise.
Apply Fortinet-provided updates to move affected FortiSandbox deployments off vulnerable versions. The provided content identifies affected versions as 5.0.0 through 5.0.1, 4.4.0 through 4.4.7, all 4.2 versions, and all 4.0 versions; organizations should upgrade to a fixed release recommended by Fortinet for their supported branch. Standard remediation practices from the advisory context also include immediate patching through a formal vulnerability management process and validation of update deployment across all affected appliances.
No public exploits tracked yet. Mallory keeps watching.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.