Overview
The cybersecurity landscape is under constant attack, with new vulnerabilities emerging almost daily. The latest threat to join this list is CVE-2025-5739, a critical vulnerability found in TOTOLINK X15 version 1.0.0-B20230714.1105. This vulnerability is present in the HTTP POST Request Handler component, specifically affecting an unknown part of the file /boafrm/formSaveConfig. Given the critical rating of this vulnerability, there is a substantial risk to data security and system integrity for any organization using the affected versions of TOTOLINK X15. Understanding and mitigating this threat is essential for safeguarding your digital assets.
Vulnerability Summary
CVE ID: CVE-2025-5739
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
TOTOLINK X15 | 1.0.0-B20230714.1105
How the Exploit Works
The vulnerability exists due to improper handling of the ‘submit-url’ argument in the HTTP POST Request Handler component of TOTOLINK X15. By manipulating this argument, an attacker can cause a buffer overflow, which can lead to unexpected behavior, including the execution of arbitrary code or a crash of the affected process. This vulnerability can be exploited remotely by an unauthenticated attacker, making it especially dangerous.
Conceptual Example Code
Here is a conceptual example of how a malicious HTTP POST request exploiting this vulnerability might look:
POST /boafrm/formSaveConfig HTTP/1.1
Host: vulnerable-device.com
Content-Type: application/x-www-form-urlencoded
submit-url=%sIn this example, `%s` represents a string that is long enough to overflow the buffer.
Mitigation and Prevention
To mitigate this vulnerability, users are advised to apply the latest patches provided by the vendor as soon as they become available. In the interim, it is recommended to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to detect and block attempts to exploit this vulnerability. Furthermore, restricting access to the affected device to trusted networks and disabling unnecessary services can reduce the potential attack surface.