EUVD-2025-16917
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Description
A vulnerability was found in Tenda AC18 15.03.05.05. It has been rated as critical. This issue affects the function formSetPPTPUserList of the file /goform/setPptpUserList. The manipulation of the argument list leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Analysis
Critical buffer overflow vulnerability in Tenda AC18 router firmware version 15.03.05.05, affecting the PPTP user list management function accessible via /goform/setPptpUserList. An authenticated attacker can exploit this remotely to achieve remote code execution with high impact on confidentiality, integrity, and availability. A public exploit proof-of-concept exists, increasing real-world exploitation risk.
Technical Context
The vulnerability exists in the formSetPPTPUserList function of Tenda AC18 wireless routers, specifically in the PPTP (Point-to-Point Tunneling Protocol) user management feature. The root cause is CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), a classic buffer overflow where user-supplied input via the 'list' parameter is not properly validated before being written to a fixed-size buffer. PPTP is a legacy VPN protocol commonly used in embedded router firmware. The affected CPE would be: cpe:2.3:o:tenda:ac18_firmware:15.03.05.05:*:*:*:*:*:*:*. This administrative interface function is typically accessed through the router's web management portal, suggesting the vulnerability resides in the HTTP request handling layer of the router's web server.
Affected Products
- vendor: Tenda; product: AC18; affected_version: 15.03.05.05; cpe: cpe:2.3:o:tenda:ac18_firmware:15.03.05.05:*:*:*:*:*:*:*; component: PPTP user list management function (/goform/setPptpUserList); status: Vulnerable - no patch version identified in available data
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External POC / Exploit Code
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