Buffer Overflow Vulnerability in TOTOLINK N150RT Router

CVE-2025-3993

What is CVE-2025-3993?

CVE-2025-3993 is a critical vulnerability identified in the TOTOLINK N150RT router, a device widely used for home and small office networking. This vulnerability arises from a buffer overflow in the processing of specific inputs to the router’s functionality, which may allow for unauthorized remote exploitation. The nature of this flaw means that attackers could potentially gain control over the router, disrupting the network services it manages and compromising the security of connected devices.

Technical Details

The vulnerability is classified as a buffer overflow issue stemming from the manipulation of the argument submit-url in the file /boafrm/formWsc. This flaw can be exploited remotely, which means that an attacker does not need physical access to the router to initiate an attack. The specific firmware version affected is 3.4.0-B20190525. As the flaw has been disclosed publicly, there is an increased risk of malicious actors using this vulnerability for targeted attacks.

Potential Impact of CVE-2025-3993

1. Remote Code Execution: Exploiting this vulnerability could allow an attacker to execute arbitrary code on the affected device, which may lead to further compromise of the network or access to sensitive information.

2. Network Disruption: By gaining unauthorized control of the router, an attacker could disrupt network services, leading to significant operational interruptions for organizations relying on uninterrupted internet access for their operations.

3. Security Breaches: The exploitation of this vulnerability may facilitate further attacks on other devices connected to the router, increasing the risk of data breaches and the exfiltration of sensitive data.

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