CVE-2026-15481 Details
Description
A security flaw has been discovered in Trendnet TEW-635BRM up to 1.00.03. This vulnerability affects the function ipoa_test of the file /sbin/rc of the component IPoA WAN Connection Setup. Performing a manipulation of the argument ipoa_ipaddr results in command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor explains: "We are unable to confirm if the vulnerability exists. This item has been EOL since 2011. We will make an official announcement of possible vulnerabilities, and recommend users to switch devices." This vulnerability only affects products that are no longer supported by the maintainer.
A command injection vulnerability has been identified in the Trendnet TEW-635BRM router, affecting firmware versions up to 1.00.03. The issue arises in the IPoA WAN Connection Setup component, specifically within the 'ipoa_test' function of the '/sbin/rc' file. The vulnerability allows remote attackers to inject arbitrary commands by manipulating the 'ipoa_ipaddr' argument, which is passed to the 'system()' function for execution without proper sanitization. This flaw could lead to complete device takeover, as the injected commands are executed with root privileges.
Users are advised to validate NVRAM inputs by enforcing a strict allowlist for the 'ipoa_ipaddr' variable, eliminating the use of 'system()' for user-controlled data, and applying the principle of least privilege to WAN management processes.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 12, 2026CISA-ADP
Assessed Jul 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/glkfc/IoT-Vulnerability/blob/main/TRENDnet/TRENDnet_TEW635BRM_ipoa_cmdinj_EN.md | [email protected] | ExploitTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-15481 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/838237 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/377788 | [email protected] | Technical DescriptionPermission Required |
| https://vuldb.com/vuln/377788/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-74 | Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | [email protected] |
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Trendnet TEW-635BRM | <= 1.00.03 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 13, 2026 | CVE Modified | CISA-ADP |
| Jul 12, 2026 | New CVE Received | [email protected] |