CVE-2025-8169
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 · uneditedA vulnerability classified as critical has been found in D-Link DIR-513 1.10. This affects the function formSetWanPPTPcallback of the file /goform/formSetWanPPTPpath of the component HTTP POST Request Handler. The manipulation of the argument curTime leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
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 confidenceA buffer overflow vulnerability exists in D-Link DIR-513 router firmware 1.10 in the formSetWanPPTPcallback function within the HTTP POST request handler for WAN PPTP settings (/goform/formSetWanPPTPpath). The curTime parameter is not properly bounds-checked, allowing remote attackers to overflow a buffer via crafted HTTP POST requests.
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= 1.10CVSS 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 device modelAccess the router web interface (typically at 192.168.0.1) and check the device information page, or look for DIR-513 labeling on the physical deviceAffected if Device is not a D-Link DIR-513 router
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Check firmware versionIn the router web interface, navigate to Status or System settings page and locate the firmware version field. Compare against version 1.10Affected if Firmware version is exactly 1.10
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Verify WAN PPTP configuration accessNavigate to WAN settings in the router web interface and check if PPTP WAN option is present or configurable at /goform/formSetWanPPTPpathAffected if The router web interface exposes WAN PPTP settings configuration page
A user is affected if they own a D-Link DIR-513 router running firmware version 1.10 and the WAN PPTP feature is accessible through the router's web interface.
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 · scopedThis device is end-of-life and no longer supported by the vendor; the recommended remediation is to replace the affected router with a currently supported model. If continued use is unavoidable, implement strict network segmentation to isolate the device.
- Replace the D-Link DIR-513 device with a currently supported model, as this product is end-of-life and no longer receives security updates from the vendor.
- If the device must remain in service temporarily, disable the PPTP WAN functionality in the router settings to eliminate the attack surface.
- Isolate the affected device on a restricted network segment to limit potential impact if exploitation occurs.
- Implement additional network monitoring to detect any exploitation attempts targeting the affected device.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-8169 — 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-2025-8169 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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