CVE-2025-46176
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 · uneditedHardcoded credentials in the Telnet service in D-Link DIR-605L v2.13B01 and DIR-816L v2.06B01 allow attackers to remotely execute arbitrary commands via firmware analysis.
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 confidenceHardcoded credentials are present in the Telnet service firmware of D-Link DIR-605L (v2.13B01) and DIR-816L (v2.06B01) routers. Attackers can extract these credentials through firmware analysis and use them to gain unauthorized remote access, enabling arbitrary command execution on the affected devices.
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= 2.13b01= 2.06b01CVSS 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
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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 router model and firmware versionLog into the router's web interface and check the Status or Firmware Upgrade page for the exact model number and firmware version. Alternatively, check the label on the device itself or use the router's admin panel to view system information.Affected if The firmware version matches exactly 2.13B01 for DIR-605L or 2.06B01 for DIR-816L.
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Confirm the Telnet service is accessibleAttempt to connect to the router's IP address on TCP port 23 using a Telnet client (e.g., telnet <router_ip>) to see if the Telnet service is listening and responding.Affected if The Telnet service accepts connections on the router, indicating it is enabled and accessible.
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Check if default or hardcoded Telnet credentials workTry logging into the Telnet service using common default credentials or any credentials known to be associated with this firmware version. Note: Do not attempt unauthorized access; this check is for authorized defenders on their own networks.Affected if Authentication succeeds with credentials that were not set by the administrator, confirming the presence of hardcoded credentials.
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Extract and analyze firmware for hardcoded credentialsIf you have access to the firmware file (download from D-Link support site or extract from device), use binwalk or similar tools to extract the filesystem, then search binary files or configuration files for hardcoded usernames/passwords strings associated with the Telnet service.Affected if The firmware analysis reveals embedded credentials that are not user-configurable and are present in the Telnet service component.
A user is affected if they are running firmware version 2.13B01 on DIR-605L or version 2.06B01 on DIR-816L, and the Telnet service is enabled and accessible with hardcoded 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.
From vendor dataApply available firmware updates from D-Link to remove hardcoded credentials; if no update exists, disable the Telnet service entirely and use secure remote management alternatives.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-46176 — 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-2025-46176 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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