D-Link DIR-882 1.01B02 HNAP1 SetNetworkSettings prog.cgi sprintf IPAddress os command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in D-Link DIR-882 1.01B02. The affected element is the function sprintf of the file prog.cgi of the component HNAP1 SetNetworkSettings Handler. This manipulation of the argument IPAddress causes os command injection. This vulnerability only affects products that are no longer supported by the maintainer. The identification of this vulnerability is CVE-2026-5844. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability classified as critical was found in D-Link DIR-882 1.01B02. Affected by this vulnerability is the function sprintf of the file prog.cgi of the component HNAP1 SetNetworkSettings Handler. The manipulation of the argument IPAddress with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at files.catbox.moe. This vulnerability is known as CVE-2026-5844. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. Technical details and also a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/09/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

It is possible to download the exploit at files.catbox.moe. It is declared as proof-of-concept.

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-2026-20855). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-882

Version

• 1.01B02

License

• commercial

Support

• end of life

Website

• Vendor: https://www.dlink.com/

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Accepted

• Submit #790290: D-Link DIR-882 1.01B02 OS Command Injection (by meshaal)

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

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