EUVD-2025-17437CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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4Description
A vulnerability was found in Tenda AC5 15.03.06.47. It has been classified as critical. Affected is the function formSetRebootTimer of the file /goform/SetRebootTimer. The manipulation of the argument rebootTime leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Analysis
A critical stack-based buffer overflow vulnerability exists in Tenda AC5 router firmware version 15.03.06.47, affecting the rebootTime parameter in the /goform/SetRebootTimer endpoint. An authenticated remote attacker can exploit this vulnerability to achieve arbitrary code execution with full system compromise (confidentiality, integrity, and availability). Public exploitation code is available, and the vulnerability has been disclosed, increasing real-world exploitation risk.
Technical Context
The vulnerability is a classic stack-based buffer overflow (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) in the formSetRebootTimer function of the Tenda AC5 router's web management interface. The router's HTTP form handler at /goform/SetRebootTimer fails to properly validate the length of the 'rebootTime' parameter before copying it into a fixed-size stack buffer. This allows an attacker to write beyond allocated memory boundaries, overwriting the stack frame including return addresses and local variables. The affected CPE is likely cpe:2.3:o:tenda:ac5_firmware:15.03.06.47:*:*:*:*:*:*:*. Tenda AC5 is a budget wireless router running proprietary firmware based on Linux kernel, commonly used in small office/home office (SOHO) environments.
Affected Products
AC5 (['15.03.06.47'])
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External POC / Exploit Code
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