CVE-2026-5351 - Vulnerability Details

Description

A weakness has been identified in Trendnet TEW-657BRM 1.00.1. This affects the function add_wps_client of the file /setup.cgi. This manipulation of the argument wl_enrolee_pin causes os command injection. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. 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." This vulnerability only affects products that are no longer supported by the maintainer.

Published: 2026-04-02

Score: 5.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The flaw occurs in the add_wps_client function of /setup.cgi on Trendnet TEW‑657BRM firmware 1.00.1. By manipulating the wl_enrolee_pin argument, an attacker can inject and execute arbitrary operating‑system commands. This allows the attacker to gain remote control over the device, potentially accessing configuration files, telnet, or other services exposed by the router.

Affected Systems

Trendnet TEW‑657BRM, firmware release 1.00.1. The device has been discontinued and reached end of life on June 23 2011; the vendor no longer provides support or security updates.

Risk and Exploitability

The CVSS base score of 5.3 indicates moderate severity. No EPSS value is available and the vulnerability is not listed in the CISA KEV catalog. Because the device is no longer supported, any exposed systems remain vulnerable unless isolated or replaced. The attack vector is remote, requiring network connectivity to the device’s web interface.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Trendnet

TEW-657BRM

affected

Version	Status	Constraints
`1.00.1`	affected	—

No data.

Vendor Product Confidence Versions

Trendnet

Tew-657brm

100%

Version	Status	Scheme	Platform
`1.00.1`	affected	semver	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Determine whether the Trendnet TEW‑657BRM is still deployed in your environment.
If the device remains in use, replace it with a supported router model and ensure the firmware is up‑to‑date.
Disable WPS or block remote management access to the device so that the vulnerable CGI file is not reachable from outside the local network.
Implement network segmentation or VLAN isolation to prevent lateral movement to the legacy equipment.
Monitor inbound traffic for anomalous requests to /setup.cgi and for signs of command execution or unusual bandwidth usage.

Generated by OpenCVE AI on April 2, 2026 at 22:59 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00841.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/panda666-888/vuls/blob/main/trendnet/tew-657brm/add_wps_client.md
https://vuldb.com/submit/781564
https://vuldb.com/vuln/354704
https://vuldb.com/vuln/354704/cti

History

Fri, 03 Apr 2026 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 03 Apr 2026 10:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Trendnet tew-657brm
Vendors & Products		Trendnet tew-657brm

Thu, 02 Apr 2026 16:00:00 +0000

Type	Values Removed	Values Added
Description		A weakness has been identified in Trendnet TEW-657BRM 1.00.1. This affects the function add_wps_client of the file /setup.cgi. This manipulation of the argument wl_enrolee_pin causes os command injection. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. 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." This vulnerability only affects products that are no longer supported by the maintainer.
Title		Trendnet TEW-657BRM setup.cgi add_wps_client os command injection
First Time appeared		Trendnet Trendnet tew-657brm Firmware
Weaknesses		CWE-77 CWE-78
CPEs		cpe:2.3:o:trendnet:tew-657brm_firmware::::::::
Vendors & Products		Trendnet Trendnet tew-657brm Firmware
References		https://github.com/panda666-888/vuls/blob/main/trendnet/tew-657brm/add_wps_client.md https://vuldb.com/submit/781564 https://vuldb.com/vuln/354704 https://vuldb.com/vuln/354704/cti
Metrics		cvssV2_0 `{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}` cvssV3_0 `{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}`

Subscriptions

Trendnet Tew-657brm Tew-657brm Firmware

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-04-02T15:45:12.604Z

Updated: 2026-04-03T19:58:42.244Z

Reserved: 2026-04-01T16:47:08.739Z

Link: CVE-2026-5351

Vulnrichment

Updated: 2026-04-03T19:58:36.458Z

NVD

Status : Awaiting Analysis

Published: 2026-04-02T16:16:28.093

Modified: 2026-04-03T16:10:23.730

Link: CVE-2026-5351

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-04-03T09:18:42Z

Weaknesses

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

Exploitation poc

Automatable no

Technical Impact partial

Subscriptions

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