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Dir 513 FirmwareOperating system · Dlink

CVE-2025-70230

CRITICAL · 9.8 CVSS v3.1 Published 2026-03-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

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 · unedited
Stack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formSetDDNS.

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 · moderate confidence

Stack buffer overflow in D-Link DIR-513 v1.10 router firmware. The curTime parameter passed to the /goform/formSetDDNS form handler is copied to a fixed-size stack buffer without proper bounds checking, allowing overflowing the stack and potentially achieving remote code execution.

MitigationIf firmware update unavailable, disable the DDNS feature on the router and restrict access to the web management interface to trusted internal networks only. Consider replacing the end-of-life device.

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
Dir 513 FirmwareOperating system
Affected:= 1.10

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm device model is D-Link DIR-513
    Access the router web interface or check the device label/metadata to verify the exact model number
    Affected if Device model is not DIR-513
  2. Identify firmware version
    Check the router administration page, typically under Status or System section, for the firmware build/version information
    Affected if Firmware version is 1.10
  3. Verify DDNS functionality is present
    Access the router web interface and navigate to the DDNS settings page, typically under Advanced or Network Settings
    Affected if DDNS configuration interface is available and accessible
  4. Check remote management exposure
    Examine the router remote management settings (often labeled as 'Remote Management', 'Web Access', or 'Administration') to determine if the web interface is reachable from WAN/Internet
    Affected if Remote management is enabled and the router is accessible from external networks

Affected if the device is a D-Link DIR-513 running firmware version 1.10 with DDNS feature present and accessible, especially if remote management is enabled

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

If firmware update unavailable, disable the DDNS feature on the router and restrict access to the web management interface to trusted internal networks only. Consider replacing the end-of-life device.

Fix this in Dir 513 Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA3.0 h
20.0 hours of engineering $3,480
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-70230 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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  • No spam, self-promotion, credentials, or personal data