Medium

Sandbox evasion in Fortinet FortiSandbox

IdentifiersCVE-2025-46215CWE-653· Improper Isolation or…

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.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

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.

Mitigation

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.

Remediation

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.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

FortinetFortisandboxapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

3 SOURCESView more in app

cisecurity blog msisca and eiisacNews

Nov 18, 2025

Multiple Vulnerabilities in Fortinet Products Could Allow for Arbitrary Code Execution

A vulnerability in FortiSandbox that allows unauthenticated attackers to evade sandbox scanning using crafted files.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2025-46215

NVD

nvd.nist.gov/vuln/detail/CVE-2025-46215

MITRE CWE · CWE-653

Improper Isolation or Compartmentalization

Vendor Advisory

fortiguard.fortinet.com/psirt/FG-IR-24-501