Trendnet TEW-657BRM 1.00.1 /setup.cgi vpn_drop policy_name os command injection

Summaryinfo

A vulnerability was found in Trendnet TEW-657BRM 1.00.1 and classified as critical. This affects the function vpn_drop of the file /setup.cgi. The manipulation of the argument policy_name results in os command injection. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability was named CVE-2026-5355. The attack may be performed from remote. In addition, an exploit is available. The vendor confirms, that "[t]he product in question (...) has been discontinued and end of life since June 23, 2011, that is more than 14 years ago. We no longer provide support for this product, so we are not able to confirm the vulnerabilities. We will make an announcement on our website's product support page and notify customers who registered their products with us."

Detailsinfo

A vulnerability classified as critical has been found in Trendnet TEW-657BRM 1.00.1. Affected is the function vpn_drop of the file /setup.cgi. The manipulation of the argument policy_name 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 for download at github.com. This vulnerability is traded as CVE-2026-5355. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vendor confirms, that "[t]he product in question (...) has been discontinued and end of life since June 23, 2011, that is more than 14 years ago. We no longer provide support for this product, so we are not able to confirm the vulnerabilities. We will make an announcement on our website's product support page and notify customers who registered their products with us."

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Trendnet

Name

• TEW-657BRM

Version

• 1.00.1

License

• commercial

Support

• end of life

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Submitinfo

Accepted

• Submit #781569: TRENDnet TEW-657BRM 1.00.1 Command Injection (by panda_0x1)

Once again VulDB remains the best source for vulnerability data.

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