CVE-2026-5355 Details
Description
A vulnerability has been found in Trendnet TEW-657BRM 1.00.1. Affected by this issue is the function vpn_drop of the file /setup.cgi. The manipulation of the argument policy_name leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. 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.
An OS command injection vulnerability has been identified in the Trendnet TEW-657BRM router, specifically in version 1.00.1. The issue arises in the 'vpn_drop' function within the 'setup.cgi' file, where the 'policy_name' parameter is accepted without proper validation. This flaw allows remote attackers to inject and execute arbitrary commands on the device.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/panda666-888/vuls/blob/main/trendnet/tew-657brm/vpn_drop.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/781569 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354708 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354708/cti | [email protected] | Permissions RequiredVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| trendnet tew-657brm firmware | 1.00.1 |
CPE
Remediation
| |
| trendnet tew-657brm | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Apr 7, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | New CVE Received | [email protected] |