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Dsl 3782 FirmwareOperating system · Dlink

CVE-2025-25896

MEDIUM · 5.7 CVSS v3.1 Published 2025-02-18
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
59/100
Remediation priority · Elevated
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
A buffer overflow vulnerability was discovered in D-Link DSL-3782 v1.01 via the destination, netmask, and gateway parameters. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted packet.

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

A buffer overflow vulnerability exists in D-Link DSL-3782 v1.01 firmware where the destination, netmask, and gateway parameters fail to properly validate input length before copying to fixed-size buffers. By sending crafted packets with oversized values in these network configuration parameters, an attacker can overflow the buffer and trigger a Denial of Service condition.

MitigationApply the vendor-supplied firmware patch when available; until then, restrict administrative access to trusted networks or IP addresses to reduce attack surface, and monitor for signs of DoS conditions.

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
Dsl 3782 FirmwareOperating system
Affected:= 1.01

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
Adjacent
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/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. Identify device model and firmware version
    Access the router's web interface or check the administrative console for the exact firmware version. This is typically found under 'Status', 'System Info', or 'Firmware Version' in the router settings.
    Affected if The device is a D-Link DSL-3782 running firmware version 1.01 exactly.
  2. Verify network administration access settings
    Check the router's remote management settings (usually under 'Advanced', 'Remote Management', or 'Administration') to determine if external/network-based administrative access is enabled.
    Affected if Remote administration or web-based management is accessible from WAN/external networks (not restricted to LAN only).
  3. Review access control rules
    Inspect the router's firewall or access control configuration to see if there are IP-based restrictions on administrative interfaces.
    Affected if Administrative access is open to untrusted networks without IP allowlist restrictions.
  4. Check for signs of device instability or crashes
    Monitor the router for unexpected reboots, loss of connectivity, or check system logs (under 'Status', 'Logs' or 'System Log') for error messages related to network configuration changes or buffer overflows.
    Affected if The device exhibits unexplained crashes, reboots, or network outages after network configuration changes.
  5. Inspect network configuration interfaces
    Examine the router's network configuration pages (typically under 'Setup', 'Network Settings', or 'WAN Settings') where destination IP, netmask, and gateway parameters can be configured.
    Affected if The router allows input to these fields without length validation or shows unusual behavior when entering longer values.

Your environment is affected if you are running D-Link DSL-3782 firmware version 1.01 with remote or unauthenticated administrative access enabled, as the buffer overflow can be triggered by sending crafted packets to the network configuration parameters.

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

Apply the vendor-supplied firmware patch when available; until then, restrict administrative access to trusted networks or IP addresses to reduce attack surface, and monitor for signs of DoS conditions.

Fix this in Dsl 3782 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,970
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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-2025-25896 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
  • No weaponised exploit code, or anything meant to cause harm
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