FortisandboxApplication · Fortinet
CVE-2025-53949
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions may allow an authenticated attacker to execute unauthorized code on the underlying system via crafted HTTP requests.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceFortiSandbox contains an OS command injection vulnerability (CWE-78) where authenticated attackers can execute unauthorized code on the underlying system through crafted HTTP requests. The vulnerability affects versions 5.0.0-5.0.2, 4.4.0-4.4.7, 4.2 all versions, and 4.0 all versions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
FortisandboxApplication
>= 4.0.0, <= 4.0.6>= 4.2.0, <= 4.2.8>= 4.4.0, <= 4.4.7>= 5.0.0, <= 5.0.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify FortiSandbox installationCheck if FortiSandbox is present in your environment by reviewing installed software, running processes, or network services. Look for processes named 'fortisandbox' or services listening on typical FortiSandbox ports (default HTTPS 443).Affected if FortiSandbox is installed and running in your environment.
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Determine installed FortiSandbox versionLog into the FortiSandbox CLI and run the command: 'get system status' or access the web UI and navigate to Dashboard > System Information to view the firmware version.Affected if The displayed version falls within 4.0.0-4.0.6, 4.2.0-4.2.8, 4.4.0-4.4.7, or 5.0.0-5.0.2.
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Verify web interface accessibilityConfirm that the FortiSandbox web interface (HTTPS) is accessible from network locations where untrusted users could send HTTP requests. Check firewall rules and interface bindings.Affected if The web interface is exposed to network segments accessible by authenticated but untrusted users.
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Review administrative account accessUse the web UI to navigate to System > Administrators or run ' diagnose system admin list' in CLI to enumerate admin accounts. Identify whether weak, default, or shared credentials exist.Affected if Admin accounts exist with accessible credentials, allowing authenticated attackers to reach the vulnerable endpoint.
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Check for recent authentication logsReview FortiSandbox logs under Log & Report > Event logs > System for suspicious administrative login activity, especially from unexpected IP addresses or at unusual times.Affected if There is evidence of unauthorized or suspicious admin access to the system.
Your environment is affected if FortiSandbox is running a version between 4.0.0 and 5.0.2 inclusive, the web interface is network-accessible, and attackers can obtain valid administrative credentials.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedApply the vendor-supplied patch or upgrade to a fixed version of FortiSandbox. Limit administrative access to trusted personnel and implement network segmentation to reduce the attack surface.
Upgrade to the latest FortiSandbox version recommended in the CVE-2025-539539 FortiGuard advisory (versions beyond 5.0.2, 4.4.7, 4.2.8, and 4.0.6)
- 1. Check FortiGuard (fortiguard.fortinet.com) for the official security advisory on CVE-2025-53949 to obtain the specific fixed version and patch information
- 2. Identify your current FortiSandbox version in the admin GUI under System > Firmware or via CLI command 'get system status'
- 3. Download the recommended firmware version from Fortinet's support portal after reviewing the release notes
- 4. Back up the FortiSandbox configuration before upgrading
- 5. Schedule a maintenance window as the upgrade may require a brief system restart
- 6. Upload and install the new firmware via the admin GUI (System > Firmware) or CLI
- 7. After reboot, verify the new version is installed and test critical functionality
- 8. Confirm the vulnerability is resolved by reviewing the firmware release notes
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Fortisandbox
Scoped from the published advisory
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,928.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-53949 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-53949 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data