CVE-2021-46321 Explained : Impact and Mitigation

Tenda AC Series Router AC11_V02.03.01.104_CN was discovered to contain a stack buffer overflow vulnerability in the wifiBasicCfg module, allowing attackers to perform a Denial of Service (DoS) attack.

Understanding CVE-2021-46321

What is CVE-2021-46321?

CVE-2021-46321 is a vulnerability found in the Tenda AC Series Router AC11_V02.03.01.104_CN, enabling attackers to cause a DoS by exploiting a stack buffer overflow in the wifiBasicCfg module.

The Impact of CVE-2021-46321

The vulnerability allows malicious actors to execute a DoS attack by sending specially crafted overflow data to the affected router.

Technical Details of CVE-2021-46321

Vulnerability Description

The stack buffer overflow vulnerability in the wifiBasicCfg module of the Tenda AC Series Router AC11_V02.03.01.104_CN permits attackers to trigger a denial of service on the device.

Affected Systems and Versions

Product: Tenda AC Series Router AC11_V02.03.01.104_CN
Vendor: Tenda
Version: n/a

Exploitation Mechanism

Attackers can exploit this vulnerability by sending crafted overflow data to the wifiBasicCfg module, causing a DoS on the router.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by Tenda to fix the vulnerability.
Monitor network traffic for any signs of unauthorized access or DoS attacks.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Keep the router's firmware up to date by applying patches released by Tenda.