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CVE-2025-57086: Stack Overflow in Tenda W30E Leading to Denial of Service

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Overview

The cybersecurity vulnerability CVE-2025-57086 is a critical bug found in Tenda W30E V16.01.0.19 (5037). This vulnerability is due to a stack overflow in the String parameter of the formDeleteMeshNode function. The impact of this vulnerability is severe, as it allows attackers to cause a Denial of Service (DoS) via a carefully crafted request. This vulnerability poses a significant risk to any system running the affected version of Tenda W30E.

Vulnerability Summary

CVE ID: CVE-2025-57086
Severity: High (7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of Service, Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Tenda W30E | V16.01.0.19 (5037)

How the Exploit Works

The exploit takes advantage of a stack overflow vulnerability in the formDeleteMeshNode function of Tenda W30E. The attacker sends a specially crafted request including an overly long string parameter to this function. This causes a buffer overflow, corrupting the stack and making the system unstable, leading to a Denial of Service. Depending on the nature of the overflow, it could potentially allow the execution of arbitrary code or leakage of sensitive data.

Conceptual Example Code

Here’s a conceptual example of a malicious HTTP request that could exploit this vulnerability:

POST /formDeleteMeshNode HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "String": "A"*5000 }

In this example, the “String” field is filled with a sequence of 5000 “A” characters, exceeding the buffer size and triggering the stack overflow.

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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.

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