Overview
The CVE-2025-53711 vulnerability pertains to the TP-Link TL-WR841N V11 wireless router. This vulnerability has the potential to cause a denial-of-service (DoS) condition due to a buffer overflow in the /userRpm/WlanNetworkRpm.htm file. The affected product is no longer supported by the vendor, making it an ideal target for attackers.
Vulnerability Summary
CVE ID: CVE-2025-53711
Severity: High (7.5 – CVSS score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Denial-of-service (DoS) condition, potential system compromise or data leakage.
Affected Products
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Product | Affected Versions
TP-Link TL-WR841N | V11
How the Exploit Works
The vulnerability exists due to missing input validation in the /userRpm/WlanNetworkRpm.htm file. An attacker could exploit this vulnerability by sending a specially crafted request to the affected router, causing a buffer overflow that could lead to a crash of the web service and result in a denial-of-service (DoS) condition. This attack can be launched remotely.
Conceptual Example Code
A conceptual example of how the vulnerability might be exploited is shown below:
GET /userRpm/WlanNetworkRpm.htm?malicious_payload HTTP/1.1
Host: vulnerable_router_ipIn this example, `malicious_payload` could be a string designed to overflow the buffer, causing a crash of the web service.
Mitigation Guidance
Users are advised to apply the vendor patch to address this vulnerability as soon as it becomes available. In the meantime, as temporary mitigation, users are suggested to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS).
