Overview
This report provides a detailed analysis of a high-risk vulnerability, CVE-2025-55603, affecting Tenda AX3 V16.03.12.10_CN. This vulnerability, a buffer overflow, has the potential to compromise systems and leak sensitive data. It is, therefore, of significant concern to users and administrators of this product.
Vulnerability Summary
CVE ID: CVE-2025-55603
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
A new way to communicate
Ameeba Chat is built on encrypted identity, not personal profiles.
Message, call, share files, and coordinate with identities kept separate.
- • Encrypted identity
- • Ameeba Chat authenticates access
- • Aliases and categories
- • End-to-end encrypted chat, calls, and files
- • Secure notes for sensitive information
Private communication, rethought.
Product | Affected Versions
Tenda AX3 | V16.03.12.10_CN
How the Exploit Works
The CVE-2025-55603 exploit works by taking advantage of a buffer overflow vulnerability in the fromSetSysTime function of Tenda AX3 V16.03.12.10_CN. This vulnerability is triggered when large amounts of data are inputted into the ntpServer parameter, causing an overflow of the buffer and potentially leading to arbitrary code execution or system crashes.
Conceptual Example Code
Below is a conceptual example of how this vulnerability might be exploited, using a specially crafted HTTP request to the vulnerable endpoint:
POST /fromSetSysTime HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
ntpServer=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA.........................................In this example, the ‘A’s represent an excessively large input that could overflow the buffer.
Mitigation Guidance
The most effective mitigation against this vulnerability is to apply the vendor-provided patch. If this is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure by detecting and blocking exploit attempts. Regularly updating and patching software is crucial for maintaining a strong security posture and protecting against such vulnerabilities.