Overview
A newly identified vulnerability, CVE-2025-5978, has been discovered in Tenda FH1202 1.2.0.14, an interface widely used by organizations globally. The vulnerability, which is deemed critical, is located in the fromVirtualSer function of the /goform/VirtualSer file. This vulnerability is of great significance due to its potential to allow an attacker to launch a remote attack, leading to a stack-based buffer overflow. This subsequently poses a considerable risk of a system compromise or possible data leakage.
Vulnerability Summary
CVE ID: CVE-2025-5978
Severity: Critical (8.8 CVSS Severity Score)
Attack Vector: Remote
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Tenda FH1202 | 1.2.0.14
How the Exploit Works
The vulnerability allows a remote attacker to manipulate the ‘page’ argument in the fromVirtualSer function. By sending a specially crafted request, the attacker can overflow the stack buffer, potentially gaining unauthorized access to sensitive information or compromising the system.
Conceptual Example Code
Below is a conceptual example of how an attack exploiting this vulnerability might be carried out. This illustrative HTTP request manipulates the ‘page’ argument, leading to a potential stack-based buffer overflow.
POST /goform/VirtualSer HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "page": "A"*1024 }In this example, the “A”*1024 represents an oversized argument value, designed to overflow the buffer.
Mitigation Guidance
Affected users are advised to apply a vendor patch as soon as it becomes available. In the meantime, utilizing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation against potential attacks exploiting this vulnerability. These systems can be configured to block or alert on suspicious requests that could be indicative of an attack.