D-Link DNS-320 1.0.2 save_ajax.php Malicious Handler unrestricted upload

Summaryinfo

A vulnerability identified as critical has been detected in D-Link DNS-320 1.0.2. This impacts an unknown function of the file /web/function/save_ajax.php. Performing a manipulation of the argument Malicious Handler results in unrestricted upload. This vulnerability is reported as CVE-2026-16331. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in D-Link DNS-320 1.0.2. It has been classified as critical. This affects some unknown functionality of the file /web/function/save_ajax.php. The manipulation of the argument Malicious Handler with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at ucn9h68n9289.feishu.cn. This vulnerability is uniquely identified as CVE-2026-16331. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/21/2026). MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

The exploit is shared for download at ucn9h68n9289.feishu.cn. It is declared as proof-of-concept. By approaching the search of inurl:web/function/save_ajax.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-46138). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• D-Link

Name

• DNS-320

Version

• 1.0.2

License

• commercial

Website

• Vendor: https://www.dlink.com/

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CPE 2.2info

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Submitinfo

Accepted

• Submit #858464: D-Link (Shanghai)Limited Corp. D-Link DNS32 1.0.2 CWE-434 (Unrestricted Upload of File with Dangerous Type) (by ucn9h68n9289.feishu.cn)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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