CVE-2026-5213
Received Received - Intake
Stack-Based Buffer Overflow in D-Link account_mgr.cgi Allows Remote Attack

Publication date: 2026-03-31

Last updated on: 2026-04-02

Assigner: VulDB

Description
A vulnerability was determined in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. The affected element is the function cgi_adduser_to_session of the file /cgi-bin/account_mgr.cgi. This manipulation of the argument read_list causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
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Meta Information
Published
2026-03-31
Last Modified
2026-04-02
Generated
2026-06-16
AI Q&A
2026-04-01
EPSS Evaluated
2026-06-15
NVD
CVE-2026-5213
Affected Vendors & Products
Showing 20 associated CPEs
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
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KEV
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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
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Executive Summary

This vulnerability exists in multiple D-Link devices and is caused by a stack-based buffer overflow in the function cgi_adduser_to_session within the file /cgi-bin/account_mgr.cgi.

The issue arises from improper handling of the argument read_list, which can be manipulated to overflow the stack buffer.

An attacker can exploit this vulnerability remotely, potentially executing arbitrary code or causing a denial of service.

The exploit has been publicly disclosed, increasing the risk of attacks.

Impact Analysis

Exploitation of this vulnerability can lead to severe impacts including remote code execution, allowing an attacker to take control of the affected device.

It can also cause denial of service by crashing the device due to the buffer overflow.

Since the attack can be initiated remotely without user interaction, it poses a significant security risk to networks using the affected D-Link devices.

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