CVE-2024-0921 is a medium severity flaw (CVSS 4.7) in D-Link DIR-816 A2. The record lists no fixed firmware and no vendor advisory. This guide covers who is affected, how to check your exposure, and what to do now.
What's affected
D-Link DIR-816 A2 firmware 1.10CNB04, the file /goform/setDeviceSettings, argument statuscheckpppoeuser.
The record gives a CVSS base score of 4.7 (Medium), vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L. The weakness class is CWE-78.
The record scores this 4.7 Medium, with a vector that requires high privileges and a higher attack complexity. Even so, command injection on a router deserves attention because of what the device controls.
The record says exploit details have been disclosed publicly, so assume that attackers can learn how the weakness works. The record lists no fixed firmware and no vendor advisory. Check the D-Link support site for your hardware revision.
How to check if you're exposed
Open the router admin page and read the firmware version. Confirm the hardware revision is A2 and the version is 1.10CNB04.
A free in-browser dependency scan at gold.safeguard.sh/scan can show whether a software package in your own projects matches this CVE, and the Gold directory entry for CVE-2024-0921 keeps the record details in one place. Reachability analysis helps you separate installations where the vulnerable code can actually be hit from those where it sits unused.
For hardware and appliances, no scanner will find them unless they are in an inventory, so start with a list of every device and application of this kind on your network.
What to do now
- Identify every instance of D-Link DIR-816 A2 in your environment, including test and forgotten systems.
- Compare the version you found with the affected range above.
- Look for a fixed release from the vendor or project. The record lists no fixed firmware and no vendor advisory.
- Apply mitigations while you wait: disable remote management, keep the admin page on the internal side only, and replace the router if the vendor does not ship a fix.
- Review logs around the affected component for unusual requests.
- Record the decision and a re-check date in your vulnerability tracker.
Why it matters
The weakness is command injection. A value from a web request reaches a shell command on the device without being cleaned, so the device can be made to run commands the owner never intended. On a router or access point that usually means control of the device with high privileges.
Network gear is a weak point for a simple reason: it is rarely patched, often exposed to the local network and sometimes to the internet, and few teams scan it the way they scan servers. A compromised access point is a foothold inside the network it serves.
The record shows this CVE is not in the CISA Known Exploited Vulnerabilities catalog, and none of the pages used for this article report exploitation in the wild.
Quick check
Why does a Medium or High router bug still matter?
Routers and access points control traffic for a whole network, and they are rarely updated or monitored.
Where can I confirm the fixed version?
Check the vendor or project advisory first. The record lists no fixed firmware and no vendor advisory. This article is based on the NVD record and the pages listed under Sources.
Sources
- https://github.com/xiyuanhuaigu/cve/blob/main/rce.md
- https://vuldb.com/?ctiid.252139
- https://vuldb.com/?id.252139
- Safeguard Gold record for CVE-2024-0921
Last reviewed: 19 October 2026.
