Is CVE-2026-5352 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-5352 being exploited in the wild.

How severe is CVE-2026-5352?

Medium severity, with a CVSS score of 6.3, published 2 April 2026.

Is there a fix for CVE-2026-5352?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-5352 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-5352?

Check whether you run TRENDnet Tew-657brm or TRENDnet Tew-657brm Firmware at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-5352: Trendnet TEW-657BRM OS command injection in setup.cgi

CVE-2026-5352 · Severity: medium · CVSS 6.3 · Published 2026-04-02

A security vulnerability exists in the Trendnet TEW-657BRM wireless router that allows an attacker to take control of the device. By sending a specially crafted request to the router's management interface, an attacker can execute unauthorized system commands. This could lead to a complete compromise of the device, interception of network traffic, or disruption of internet services. However, this product reached its end-of-life in 2011 and is no longer supported by the manufacturer.

Technologies: TRENDnet Tew-657brm, TRENDnet Tew-657brm Firmware. Vendors: TRENDnet.

Quick answers

Is CVE-2026-5352 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-5352 being exploited in the wild.
How severe is CVE-2026-5352?: Medium severity, with a CVSS score of 6.3, published 2 April 2026.
Which products and versions are affected?: TRENDnet Tew-657brm 1.00.1.
Is there a fix for CVE-2026-5352?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-5352 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-5352?: Check whether you run TRENDnet Tew-657brm or TRENDnet Tew-657brm Firmware at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An OS command injection vulnerability exists in the Trendnet TEW-657BRM router firmware version 1.00.1. The 'Edit' function within the '/setup.cgi' script fails to properly sanitize the 'pcdb_list' parameter before passing it to a system shell (SYSTEM function). A remote attacker with low privileges (authenticated) can exploit this by sending a crafted POST request to execute arbitrary commands on the underlying operating system. The vendor has stated the product is end-of-life (EOL) as of June 2011 and will not be issuing a patch. A public exploit (PoC) is available.

Affected products

Trendnet TEW-657BRM 1.00.1

Timeline

2011-06-23: other: Product reached End-of-Life (EOL) status
2026-04-02: disclosed: Public disclosure of the vulnerability and exploit
2026-04-02: advisory

References

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