Overview
The cybersecurity landscape is constantly evolving, with new vulnerabilities being discovered and exploited on a regular basis. One such vulnerability, CVE-2025-5862, is a critical issue found within Tenda AC7 15.03.06.44. The vulnerability affects the function formSetPPTPUserList of the file /goform/setPptpUserList. This vulnerability stands out due to its critical severity and the potential it possesses for system compromise and data leakage.
As the vulnerability can be exploited remotely, it poses a significant threat to the integrity of systems running on the affected Tenda AC7 version. It is vital for users and administrators to understand this vulnerability and take appropriate steps to mitigate its potential impact.
Vulnerability Summary
CVE ID: CVE-2025-5862
Severity: Critical – CVSS Score 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Tenda AC7 | 15.03.06.44
How the Exploit Works
The vulnerability arises from a buffer overflow condition in the formSetPPTPUserList function of the /goform/setPptpUserList file. Buffer overflow is a common type of security vulnerability that is caused by writing data to a buffer and exceeding that buffer’s boundary and overwriting adjacent memory. This can result in erratic program behavior, including memory access errors, incorrect results, program termination, or a breach of system security.
In the case of CVE-2025-5862, the manipulation of the argument list in the affected function leads to the buffer overflow. With a carefully crafted payload, an attacker can trigger the overflow and execute arbitrary code on the system. This vulnerability can be exploited remotely, without user interaction or privileges.
Conceptual Example Code
Below is a hypothetical example of how this vulnerability could potentially be exploited. This is a conceptual demonstration only and does not represent actual exploit code.
POST /goform/setPptpUserList HTTP/1.1
Host: affected-device-ip
Content-Type: application/x-www-form-urlencoded
argument_list=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...[continue until buffer overflow]In this example, the `argument_list` parameter is filled with an excessive amount of ‘A’ characters, causing a buffer overflow. In an actual attack scenario, the ‘A’ characters would be replaced with a carefully crafted payload designed to execute arbitrary code on the system.