Ameeba Security Research

Defensive CVE and exploit intelligence

Ameeba Blog Search
TRENDING · 1 WEEK
Attack Vector
Vendor
Severity

CVE-2025-7529: Critical Buffer Overflow Vulnerability in Tenda FH1202

Views: 337

Overview

A critical vulnerability has been identified in Tenda FH1202 version 1.2.0.14(408). This vulnerability, classified as a stack-based buffer overflow, can lead to potential system compromise or data leakage. It is particularly alarming because it can be exploited remotely, increasing the potential range and impact of attacks. The vulnerability is linked to the function fromNatlimit in the file /goform/Natlimit, and the manipulation of the argument ‘page’ can trigger it.
This discovery is of high interest to both security teams and potential threat actors due to its severity and the widespread use of Tenda products. Therefore, it is crucial that users understand the nature of this vulnerability and take immediate steps to mitigate any potential risks.

Vulnerability Summary

CVE ID: CVE-2025-7529
Severity: Critical, CVSS Severity Score: 8.8
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

Ameeba Chat Icon Share secrets securely

Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.

Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.

  • • Encrypted identity
  • • Private Spaces for organizations and teams
  • • End-to-end encrypted chat, calls, files, and notes
  • • Sensitive AI work and protected collaboration
  • • Built for information that cannot leak

Our mission is to secure human work alongside AI.

Product | Affected Versions

Tenda FH1202 | 1.2.0.14(408)

How the Exploit Works

The vulnerability lies in the ‘fromNatlimit’ function in the file ‘/goform/Natlimit. When the ‘page’ argument is manipulated, it can cause a stack-based buffer overflow. This means that an attacker can flood the buffer with more data than it can handle, which can lead to the overwriting of adjacent memory locations. Consequently, this can allow an attacker to execute arbitrary code and potentially compromise the system or leak data.

Conceptual Example Code

An attacker might exploit the vulnerability through a malicious HTTP request such as:

POST /goform/Natlimit HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "page": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..." }

In this conceptual example, the “page” argument is overloaded with an excessive amount of ‘A’ characters, triggering the buffer overflow.

Mitigation

Users of Tenda FH1202 are strongly urged to apply the vendor-provided patch for this vulnerability. In the interim, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. Regularly updating and patching systems is crucial in maintaining a strong cybersecurity posture. Additionally, monitoring system logs for unusual activities can aid in early detection of potential exploitation attempts.

Want to discuss this further? Join the Ameeba Cybersecurity Group Chat.

Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

More posts

Ameeba Chat