CVE-2025-55583
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 · uneditedD-Link DIR-868L B1 router firmware version FW2.05WWB02 contains an unauthenticated OS command injection vulnerability in the fileaccess.cgi component. The endpoint /dws/api/UploadFile accepts a pre_api_arg parameter that is passed directly to system-level shell execution functions without sanitization or authentication. Remote attackers can exploit this to execute arbitrary commands as root 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 confidenceThe D-Link DIR-868L B1 router firmware version FW2.05WWB02 contains an unauthenticated OS command injection vulnerability in the fileaccess.cgi component. The /dws/api/UploadFile endpoint accepts a pre_api_arg parameter that is passed directly to system-level shell execution functions without any sanitization or authentication checks, allowing remote attackers to execute arbitrary commands as root.
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= 2.05b02CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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 the device modelAccess the router web interface or check the device label to confirm the model is D-Link DIR-868L B1Affected if The device is a D-Link DIR-868L B1 router
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Check the firmware versionLog into the router web interface and navigate to the Status or System Information page to view the firmware version, or check the fileaccess.cgi binary version if accessible via firmware extractionAffected if The firmware version is 2.05b02 or FW2.05WWB02
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Verify the UploadFile endpoint existsAttempt to access http://<router-ip>/dws/api/UploadFile via HTTP request to confirm the endpoint is present and respondsAffected if The /dws/api/UploadFile endpoint returns a valid HTTP response (even if error) indicating the CGI component is present
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Confirm network accessibility of the management interfaceCheck if the router web interface (port 80/443) is reachable from untrusted networks, or perform a port scan to verify the HTTP service is exposedAffected if The router HTTP/HTTPS management interface is accessible from external or untrusted networks
You are affected if you are running D-Link DIR-868L B1 firmware version 2.05b02 and the router management interface is network-accessible, as the unauthenticated command injection in the /dws/api/UploadFile endpoint can then be exploited.
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.
From vendor dataImmediately restrict network exposure of the affected device or replace the end-of-life router, as no vendor patch is likely available for this discontinued product; implement network segmentation and disable remote management interfaces as compensating controls until replacement.
- Consultation4.0 h
- Implementation8.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-55583 — 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-2025-55583 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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- 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
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