EUVD-2026-18358CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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4Description
A vulnerability was identified in Trendnet TEW-657BRM 1.00.1. The affected element is the function add_apcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might 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.
Analysis
Stack-based buffer overflow in Trendnet TEW-657BRM router firmware 1.00.1 allows authenticated remote attackers to achieve arbitrary code execution via the mac_pc_dba parameter in /setup.cgi's add_apcdb function. The product was discontinued in 2011 and receives no vendor support. …
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Remediation
Within 24 hours: Inventory all Trendnet TEW-657BRM routers in production and document network segments where deployed. Within 7 days: Isolate affected devices to a segregated VLAN with restrictive access controls and disable remote administrative access. …
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