Overview
The CVE-2025-5907 is a critical vulnerability discovered in TOTOLINK’s EX1200T versions up to 4.1.2cu.5232_B20210713. This vulnerability is a classified buffer overflow threat that affects the HTTP POST request handler within the /boafrm/formFilter file. As this vulnerability can be initiated remotely and has been publicly disclosed, it poses a significant risk to businesses that rely on the affected TOTOLINK device.
This vulnerability’s significance lies in its potential for system compromise and data leakage, which can lead to loss of sensitive data, financial losses, and reputational damage. Therefore, it is crucial for organizations to understand this vulnerability and apply necessary mitigations promptly.
Vulnerability Summary
CVE ID: CVE-2025-5907
Severity: Critical (8.8/10)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
Escape the Surveillance Era
Most apps won’t tell you the truth.
They’re part of the problem.
Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.
Ameeba Chat gives you a way out.
- • No phone number
- • No email
- • No personal info
- • Anonymous aliases
- • End-to-end encrypted
Chat without a trace.
Product | Affected Versions
TOTOLINK EX1200T | Up to 4.1.2cu.5232_B20210713
How the Exploit Works
The vulnerability exists due to a buffer overflow in the HTTP POST request handler of the /boafrm/formFilter file. This overflow happens when the system is manipulated with an excess of data that exceeds its capacity. When the buffer is overwhelmed, the extra data can overwrite adjacent memory locations, leading to erratic program behavior, system crashes, or potentially, the execution of malicious code.
Conceptual Example Code
This is a conceptual example showing how an attacker might exploit this vulnerability. It involves sending a malicious HTTP post request to the vulnerable endpoint. Please note that this is a simplified representation and actual exploit code may vary.
POST /boafrm/formFilter HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "A"*5000 }In this example, the “A”*5000 represents an overflow of data sent to the server, potentially leading to buffer overflow.
Mitigation
The primary mitigation for this vulnerability is to apply the vendor patch as soon as it is available. In the absence of a patch or until it can be applied, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation strategy. These tools can help detect and block attempts to exploit this vulnerability.