CVE-2026-75488 · Infrastructure
NO FIX YET · SEE WHAT TO DO
The Cudy TR3000 router's CWMP (TR-069) client copies oversized Username and Password values into a 128-byte stack buffer without bounds checking. A malicious or compromised ACS (auto-configuration server) can send 256-byte credentials in Download or Upload requests, corrupting stack memory and crashing the CWMP process.
first public Nov 13, 2026 · 1 source
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Cudy TR3000 routers running firmware before 2.5.42 that use the CWMP/TR-069 client, which is what lets the device be managed by an ACS. Exposure depends on the ACS being attacker-controlled, so the risk is highest where the ACS path or its credentials can be influenced. Devices without TR-069 management enabled, or on firmware 2.5.42 or later, are not affected.
Not affected if cwmp-disabled, firmware-2.5.42-or-later, managed-hosting
Who cares cudy, cwmp, home-router, router, tr-069, tr3000
2.5.42.2.5.42 or later.Cudy TR3000 before 2.5.42 contains a stack buffer overflow vulnerability in the CWMP client that allows a malicious ACS to corrupt stack memory via oversized credentials. Attackers controlling the ACS can send Username and Password values up to 256 bytes in TR-069 Download or Upload requests, overflowing 128-byte stack buffers and crashing the CWMP process.
This page as .md · .json · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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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