CVE-2026-16327
Received Received - Intake

Unrestricted File Upload in D-Link DNS-320

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: VulDB

Description
A vulnerability was determined in D-Link DNS-320 1.0.2. This issue affects some unknown processing of the file /web/web_file/upload.php. Executing a manipulation of the argument File can lead to unrestricted upload. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-21
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
CVE-2026-16327
EUVD
EUVD-2026-46135

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
d-link dns-320 1.0.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

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Executive Summary

This vulnerability affects D-Link DNS-320 version 1.0.2. It involves a flaw in the file upload functionality at /web/web_file/upload.php. An attacker can manipulate the 'File' argument to upload unrestricted files, potentially leading to remote code execution or other malicious activities.

Detection Guidance

Detecting this vulnerability may involve checking for unauthorized file uploads to /web/web_file/upload.php on D-Link DNS-320 devices. Monitor network traffic for POST requests to this endpoint with suspicious file types or unusual parameters. Use tools like Wireshark or tcpdump to inspect traffic. Verify if unknown files exist in web-accessible directories.

Impact Analysis

An attacker could exploit this to upload malicious files to the device, gaining unauthorized access, executing arbitrary code, or compromising the system. This could lead to data theft, system damage, or further network infiltration.

Compliance Impact

This vulnerability allows unrestricted file uploads, which could enable attackers to upload malicious files. This may lead to unauthorized access, data exfiltration, or malware execution, potentially violating GDPR (data protection) and HIPAA (health data security) compliance by exposing sensitive information.

Mitigation Strategies

Immediately update the D-Link DNS-320 firmware to the latest version if a patch is available. Disable or restrict access to the /web/web_file/upload.php endpoint if not required. Implement network segmentation to limit exposure. Monitor for signs of exploitation such as unexpected files or unusual traffic patterns.

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