What is CVE-2026-5351?

CVE-2026-5351 is a medium-severity vulnerability in Trendnet Tew-657brm, classified under Command Injection. CVSS score: 6.3/10. Published 2026-04-02.

How severe is CVE-2026-5351?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in Trendnet Tew-657brm

CVE-2026-5351

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-04-02 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.057 (92.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.049 · newest: 0.057 · change: +0.008

Affected products

Trendnet Tew-657brm — versions 1.00.1
Trendnet Tew-657brm Firmware — versions 1.00.1

Weakness classification (CWE)

References

vuldb.com/vuln/354704 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/vuln/354704/cti (signature, Permissions Required, permissions-required, VDB Entry)
vuldb.com/submit/781564 (VDB Entry, Third Party Advisory, third-party-advisory)
github.com/panda666-888/vuls/blob/main/trendnet/tew-657brm/add_wps_client.md (Exploit, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2026-5351?: CVE-2026-5351 is a medium-severity vulnerability in Trendnet Tew-657brm, classified under Command Injection. CVSS score: 6.3/10. Published 2026-04-02.
How severe is CVE-2026-5351?: Medium severity. CVSS v3 base score is 6.3 out of 10.