Overview
CVE-2025-55852 is a significant buffer overflow vulnerability that affects Tenda AC8 v16.03.34.06. This vulnerability is linked to the formWifiBasicSet function via the parameters security or security_5g. As a result, unauthorized users could potentially exploit this weakness to compromise systems or leak sensitive data. Therefore, it’s crucial to address this vulnerability promptly and efficiently.
Vulnerability Summary
CVE ID: CVE-2025-55852
Severity: High (7.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage
Affected Products
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Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.
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Product | Affected Versions
Tenda AC8 | v16.03.34.06
How the Exploit Works
The exploit operates by injecting oversized data into the ‘security’ or ‘security_5g’ parameters of the formWifiBasicSet function. This data overflow can corrupt the memory space of the application, leading to unexpected behavior such as crashes, data corruption, and in worst-case scenarios, arbitrary code execution. Thus, an attacker could manipulate the system or access sensitive data.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This example represents a malicious HTTP POST request sent to the vulnerable endpoint.
POST /formWifiBasicSet HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
security=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIn this example, the ‘A’s represent an excessively long string that triggers the buffer overflow.