Overview
The report presents a critical vulnerability discovered in TP-Link TL-WR841N V11, a product no longer supported by the maintainer. The vulnerability is associated with a lack of input parameter validation in a specific file, resulting in potential system crashes and denial-of-service (DoS) condition. This vulnerability matters as it can be exploited remotely, potentially compromising systems or leading to data leakage.
Vulnerability Summary
CVE ID: CVE-2025-53714
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
TP-Link TL-WR841N | V11
How the Exploit Works
The exploit takes advantage of the lack of input parameter validation in the /userRpm/WzdWlanSiteSurveyRpm_AP.htm file. The attacker can send a specially crafted request to overflow the buffer, causing the web service to crash and resulting in a denial-of-service. This can potentially lead to system compromise or data leakage.
Conceptual Example Code
Below is a hypothetical example of how the vulnerability could be exploited using a malicious HTTP request:
GET /userRpm/WzdWlanSiteSurveyRpm_AP.htm?malicious_payload HTTP/1.1
Host: vulnerable.router.comIn this example, `malicious_payload` is a specially designed string that causes buffer overflow in the targeted system, leading to service disruption.
Mitigation Guidance
Users are advised to apply the vendor-supplied patch to resolve this vulnerability. In the absence of a patch, the use of web application firewall (WAF) or intrusion detection systems (IDS) may serve as a temporary mitigation measure. Regular updates and patches from the vendor are highly recommended to prevent such vulnerabilities.
