Overview
We are discussing a severe cybersecurity flaw that has cropped up in TOTOLINK’s EX1200T 4.1.2cu.5232_B20210713. This vulnerability, coded as CVE-2025-5793, is considered critical due to its potential to cause system compromise or data leakage, which could have disastrous consequences for affected users. As it affects an unknown function of the file /boafrm/formPortFw in the HTTP POST Request Handler component, this vulnerability is of particular concern to anyone using the affected version of TOTOLINK EX1200T.
Vulnerability Summary
CVE ID: CVE-2025-5793
Severity: Critical (CVSS 8.8)
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 | 4.1.2cu.5232_B20210713
How the Exploit Works
The CVE-2025-5793 vulnerability arises from a fault in an unknown function of the file /boafrm/formPortFw in the HTTP POST Request Handler. This flaw results in a buffer overflow when the service_type argument is manipulated. An attacker could use this vulnerability to send a specially crafted HTTP POST request to the affected system, causing the buffer overflow. This can lead to potential system compromise or data leakage.
Conceptual Example Code
Here is a
conceptual
example of how an attacker might exploit the vulnerability:
POST /boafrm/formPortFw HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
service_type=OVERFLOWING_VALUEIn the above example, the attacker sends an HTTP POST request with a buffer-overflow-inducing value for the service_type argument.
Mitigation and Remediation
The most effective way to mitigate this vulnerability is by applying the patch provided by the vendor. If the patch is not immediately available or cannot be applied in a timely manner, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation. These solutions can be configured to detect and block the specific HTTP POST requests associated with this exploit. However, it’s crucial to remember that these are temporary measures, and the vendor’s patch should be applied as soon as feasible to fully resolve the vulnerability.