CVE-2026-4213
Stack-Based Buffer Overflow in D-Link CGI Allows Remote Exploit
Publication date: 2026-03-16
Last updated on: 2026-03-19
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| dlink | dnr-202l_firmware | to 2026-02-05 (inc) |
| dlink | dnr-326_firmware | to 2026-02-05 (inc) |
| dlink | dns-1100-4_firmware | to 2026-02-05 (inc) |
| dlink | dns-120_firmware | to 2026-02-05 (inc) |
| dlink | dns-1200-05_firmware | to 2026-02-05 (inc) |
| dlink | dns-1550-04_firmware | to 2026-02-05 (inc) |
| dlink | dns-315l_firmware | to 2026-02-05 (inc) |
| dlink | dns-320_firmware | to 2026-02-05 (inc) |
| dlink | dns-320l_firmware | to 2026-02-05 (inc) |
| dlink | dns-320lw_firmware | to 2026-02-05 (inc) |
| dlink | dns-321_firmware | to 2026-02-05 (inc) |
| dlink | dns-322l_firmware | to 2026-02-05 (inc) |
| dlink | dns-323_firmware | to 2026-02-05 (inc) |
| dlink | dns-325_firmware | to 2026-02-05 (inc) |
| dlink | dns-326_firmware | to 2026-02-05 (inc) |
| dlink | dns-327l_firmware | to 2026-02-05 (inc) |
| dlink | dns-340l_firmware | to 2026-02-05 (inc) |
| dlink | dns-343_firmware | to 2026-02-05 (inc) |
| dlink | dns-345_firmware | to 2026-02-05 (inc) |
| dlink | dns-726-4_firmware | to 2026-02-05 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in multiple D-Link devices, including models DNS-120, DNR-202L, DNS-315L, DNS-320 series, DNS-321, and others up to version 20260205. It affects the functions cgi_myfavorite_del_user and cgi_myfavorite_verify within the file /cgi-bin/gui_mgr.cgi. The issue is a stack-based buffer overflow that can be triggered remotely by manipulating these functions. This means an attacker can exploit this flaw from a remote location to potentially execute arbitrary code or cause a denial of service.
How can this vulnerability impact me? :
The vulnerability can have severe impacts including unauthorized remote code execution or denial of service on affected D-Link devices. Because it is a stack-based buffer overflow exploitable remotely, attackers could gain control over the device or disrupt its normal operation, potentially compromising network security and availability.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know