Overview
The cybersecurity landscape is littered with countless vulnerabilities and threats, but every so often, a particularly serious flaw garners increased attention and concern. Such is the case with the recently discovered CVE-2025-9087 vulnerability. This vulnerability exists in Tenda AC20 16.03.08.12, specifically affecting the function set_qosMib_list of the file /goform/SetNetControlList within the SetNetControlList Endpoint component. The exploitation of this vulnerability can lead to a stack-based buffer overflow, a type of security issue that can have severe consequences, including potential system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-9087
Severity: High, CVSS score of 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: The successful exploitation of this vulnerability could result in a system compromise or data leakage.
Affected Products
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Product | Affected Versions
Tenda AC20 | 16.03.08.12
How the Exploit Works
This vulnerability arises from a lack of proper input validation in the set_qosMib_list function of the file /goform/SetNetControlList. An attacker can exploit the vulnerability by manipulating the argument list of the function, triggering a stack-based buffer overflow. Given that the vulnerability can be exploited remotely and does not require any user interaction, it presents a significant risk. The exploit has been disclosed to the public, making systems running the affected version of Tenda AC20 more vulnerable to potential attacks.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP request that includes a malicious payload designed to trigger the buffer overflow:
POST /goform/SetNetControlList HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "set_qosMib_list": "malicious_payload" }Please note that this is a conceptual example and should not be tried on a live system.
To mitigate the risk associated with this vulnerability, vendors are advised to apply the available patches. In circumstances where patching is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, these should not be considered long-term solutions, and patching should be prioritized as soon as feasible.