TRENDnet TEW-821DAP 1.11B03 Firmware Update /goform/tools_ddns sub_42026C hostname/username/password os command injection

Summaryinfo

A vulnerability has been found in TRENDnet TEW-821DAP 1.11B03 and classified as critical. This impacts the function sub_42026C of the file /goform/tools_ddns of the component Firmware Update Handler. Performing a manipulation of the argument hostname/username/password results in os command injection. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability was named CVE-2026-15486. The attack may be initiated remotely. There is no available exploit. The vendor explains: "We are unable to confirm the existence of the vulnerabilities for (...) TEW-821DAP (v1.0R) as these items have been EOL. "

Detailsinfo

A vulnerability classified as critical has been found in TRENDnet TEW-821DAP 1.11B03. This affects the function sub_42026C of the file /goform/tools_ddns of the component Firmware Update Handler. The manipulation of the argument hostname/username/password with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-15486. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/11/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

The vendor explains: "We are unable to confirm the existence of the vulnerabilities for (...) TEW-821DAP (v1.0R) as these items have been EOL. "

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

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

Productinfo

Vendor

• TRENDnet

Name

• TEW-821DAP

Version

• 1.11B03

License

• commercial

Support

• end of life

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Accepted

• Submit #842383: Trendnet TEW-821DAP v1.11B03 CWE-78 Improper Neutralization of Special Elements used in an O (by IOT_Res)

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

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