CVE-2021-46262 : Vulnerability Insights and Analysis

Tenda AC Series Router AC11_V02.03.01.104_CN has a stack buffer overflow vulnerability in the PPPoE module, enabling a Denial of Service attack.

Understanding CVE-2021-46262

What is CVE-2021-46262?

The Tenda AC Series Router AC11_V02.03.01.104_CN is prone to a stack buffer overflow within the PPPoE module, allowing threat actors to execute a Denial of Service (DoS) attack by sending specially crafted data.

The Impact of CVE-2021-46262

Exploiting this vulnerability can result in a Denial of Service (DoS) condition, disrupting network connectivity and making the affected device inaccessible.

Technical Details of CVE-2021-46262

Vulnerability Description

The vulnerability in the PPPoE module of Tenda AC11_V02.03.01.104_CN router allows attackers to trigger a stack buffer overflow, leading to a DoS condition.

Affected Systems and Versions

Product: Tenda AC Series Router AC11_V02.03.01.104_CN
Vendor: Tenda
Version: V02.03.01.104_CN

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specifically crafted data to the PPPoE module, causing it to overflow and potentially crash the router.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by Tenda promptly.
Implement network segmentation to minimize the impact of potential attacks.
Monitor network traffic for any suspicious activity targeting the PPPoE module.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Conduct regular security assessments to identify and address weaknesses proactively.

Patching and Updates

Ensure you install the latest firmware updates and security patches released by Tenda to address this vulnerability.