CVE-2026-1744
Cross-Site Scripting in D-Link DSL-6641K PPPoE Function
Publication date: 2026-02-02
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| dlink | dsl-6641k_firmware | n8.tr069.20131126 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
| CWE-94 | The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-1744 is a stored cross-site scripting (XSS) vulnerability in the D-Link DSL-6641K router, specifically in the function doSubmitPPP within the sp_pppoe_user.js file. The vulnerability occurs because the Username argument is not properly sanitized or encoded, allowing an attacker to inject malicious JavaScript code. This malicious script is stored in the router's configuration and executed when the configuration is accessed, potentially compromising the integrity of the system. Exploitation requires remote access with elevated privileges and some user interaction. [1, 2]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing an attacker to inject and execute malicious scripts in the context of your browser when interacting with the affected router's configuration interface. This could lead to unauthorized actions or manipulation of the router's settings, potentially compromising the device's integrity. However, exploitation requires elevated privileges and some user interaction, and the affected products are no longer supported, meaning no official fixes are available. [1, 2]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by inspecting the Username field in the PPPoE configuration form of the D-Link DSL-6641K router for malicious JavaScript code injections. Since the vulnerability is a stored cross-site scripting (XSS) in the sp_pppoe_user.js file's doSubmitPPP function, you can check the router's configuration for suspicious script tags or JavaScript code embedded in the Username field. There are no specific commands provided for detection, but manual inspection of the router's web interface or configuration files for script injections in the Username parameter is recommended. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing the affected D-Link DSL-6641K router with a supported device, as no known countermeasures or mitigations have been identified for this vulnerability. Since the product is no longer supported by the maintainer and the vulnerability allows remote exploitation, discontinuing use of the affected device is recommended to prevent exploitation. [1]