EUVD-2025-17397
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 has been found in Tenda AC9 15.03.02.13 and classified as critical. Affected by this vulnerability is the function formSetSafeWanWebMan of the file /goform/SetRemoteWebCfg of the component HTTP POST Request Handler. The manipulation of the argument remoteIp leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Analysis
Critical stack-based buffer overflow vulnerability in Tenda AC9 router firmware version 15.03.02.13, exploitable via the HTTP POST handler's formSetSafeWanWebMan function through manipulation of the remoteIp parameter. An authenticated remote attacker can achieve remote code execution with full system compromise (confidentiality, integrity, and availability impact). A public proof-of-concept exploit exists, elevating real-world exploitation risk significantly.
Technical Context
The vulnerability exists in the HTTP POST request handler component of Tenda AC9 firmware, specifically in the /goform/SetRemoteWebCfg endpoint's formSetSafeWanWebMan function. The root cause is CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), manifesting as a classic stack-based buffer overflow. The remoteIp parameter lacks proper input validation and bounds checking, allowing an attacker to write beyond allocated stack memory. This affects network device firmware where the HTTP interface processes user-supplied configuration data without adequate sanitization. The affected CPE would be cpe:2.3:h:tenda:ac9:15.03.02.13:*:*:*:*:*:*:*, indicating the specific hardware model and firmware version combination.
Affected Products
- vendor: Tenda; product: AC9; affected_version: 15.03.02.13; model: AC9; component: HTTP POST Request Handler (/goform/SetRemoteWebCfg); function: formSetSafeWanWebMan; cpe: cpe:2.3:h:tenda:ac9:15.03.02.13:*:*:*:*:*:*:*; status: Vulnerable
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External POC / Exploit Code
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