CVE-2024-57678
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 · uneditedAn access control issue in the component form2WlAc.cgi of D-Link 816A2_FWv1.10CNB05_R1B011D88210 allows unauthenticated attackers to set the 2.4G and 5G mac access control list of the device via a crafted POST request.
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 confidenceThis is an authentication bypass vulnerability in D-Link 816A2 router firmware v1.10CNB05 where the form2WlAc.cgi component fails to enforce proper access controls. Unauthenticated attackers can send crafted POST requests to modify the MAC access control lists for both 2.4GHz and 5GHz wireless networks, potentially allowing or blocking specific devices from connecting to the network.
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= 1.10cnb05_r1b011d88210CVSS 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 modelAccess the router's web administration interface and check the device information page, or use network discovery to identify the device model. Look for 'DIR-816A2' or '816A2' in the device identification.Affected if The device is not a D-Link DIR-816A2 router, then this specific CVE does not apply.
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Check the installed firmware versionIn the router's web interface, navigate to the Status or System Settings page to view the firmware version. Compare the version string to '1.10cnb05_r1b011d88210'.Affected if The firmware version matches exactly 1.10cnb05_r1b011d88210, the router is running the vulnerable version.
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Verify router web interface accessibilityAttempt to access the router's HTTP/HTTPS management interface from the network. The vulnerable component is form2WlAc.cgi which handles wireless MAC access control settings.Affected if The router's web interface is accessible and responds to requests, the device could be exploited if the firmware version is vulnerable.
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Check if remote management is enabledIn the router's web interface, go to the Management or Advanced settings and check if 'Remote Management' or 'Remote Web Management' is enabled. This setting controls access to the web interface from external networks.Affected if Remote management is enabled, the vulnerability could be exploited from outside the local network. Even with remote management disabled, local network attackers could exploit this.
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Inspect wireless MAC filtering configurationNavigate to the wireless security settings in the router interface and review the MAC access control list configuration for both 2.4GHz and 5GHz bands.Affected if MAC filtering is configured, an attacker could modify these settings to allow or block specific devices from connecting.
A user is affected if they are running D-Link DIR-816A2 router with firmware version 1.10cnb05_r1b011d88210 and the router's web management interface is accessible from the network where an attacker can send POST requests to form2WlAc.cgi.
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 · scopedApply vendor-supplied firmware patch from D-Link when available. In the interim, restrict network access to the device's management interface using firewall rules or network segmentation to prevent unauthorized external access.
DIR-816 firmware version newer than 1.10CNB05_R1B011D88210 (check D-Link support for latest available version)
- 1. Visit D-Link's official support page for the DIR-816 router at www.dlink.com
- 2. Navigate to the firmware downloads section for the DIR-816 model
- 3. Download the latest available firmware version (newer than 1.10CNB05_R1B011D88210)
- 4. Access the router's web management interface by entering the device's IP address in a browser
- 5. Go to the 'System' or 'Management' settings section
- 6. Locate the 'Firmware Upgrade' or 'Update Firmware' option
- 7. Click 'Browse' and select the downloaded firmware file
- 8. Click 'Upload' or 'Upgrade' to apply the new firmware
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-57678 — 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-2024-57678 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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- Version or environment caveats, and links to real fixes
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