D-Link DNS-320 Unrestricted File Upload Flaws

Unrestricted file upload in D-Link DNS-320 1.0.2 exposes the device to remote exploitation through the `/mydlink/multi_uploadify.php` PHP endpoint, where the `Filedata[]` parameter accepts arbitrary file types without validation. Remote unauthenticated attackers can upload malicious files - including PHP webshells - to the device filesystem, potentially achieving code execution on the NAS. A public proof-of-concept exploit is available per VulDB reporting, which elevates the urgency for owners of internet-facing DNS-320 units to act despite the absence of a CISA KEV listing.

Unrestricted file upload in D-Link DNS-320 NAS firmware 1.0.2 exposes unauthenticated remote attackers to arbitrary PHP file upload via the `/web/jquery/uploader/uploadify.php` endpoint, likely enabling remote code execution on the embedded Linux system. A public proof-of-concept exploit has been released, significantly lowering the skill barrier for exploitation. No vendor patch has been identified, and the device is a legacy product that may be end-of-life, leaving affected deployments without a vendor-supported remediation path.

Unrestricted file upload in D-Link DNS-320 NAS firmware 1.0.2 exposes the /photo_center/php/uploadify.php endpoint to unauthenticated remote attackers who can manipulate the 'Malicious Handler' argument to upload arbitrary files to the device. The vulnerability stems from CWE-434 (Unrestricted Upload of File with Dangerous Type), a class of flaw that on PHP-backed NAS web interfaces frequently enables follow-on code execution by uploading a web shell. A public proof-of-concept exploit is available, elevating the realistic risk beyond what the moderate CVSS 4.0 base score of 6.9 alone would suggest, though no CISA KEV listing confirms active in-the-wild campaigns at time of analysis.

Unrestricted file upload in D-Link DNS-320 firmware 1.0.2 allows remote unauthenticated attackers to upload arbitrary files - including executable PHP webshells - via the `/web/function/save_ajax.php` endpoint by manipulating the handler argument. This effectively enables persistent remote code execution on an end-of-life NAS device for which no vendor patch is expected. A public proof-of-concept exploit has been disclosed, lowering the skill barrier for exploitation; however, no CISA KEV listing was identified at time of analysis.