CVE-2021-20730 : What You Need to Know

This article provides details about CVE-2021-20730, an improper access control vulnerability affecting BUFFALO INC.'s WSR-1166DHP3 and WSR-1166DHP4 routers.

Understanding CVE-2021-20730

CVE-2021-20730 is a security vulnerability found in the firmware of WSR-1166DHP3 and WSR-1166DHP4 routers manufactured by BUFFALO INC. This vulnerability allows an attacker to access configuration information through unspecified vectors.

What is CVE-2021-20730?

The CVE-2021-20730 vulnerability involves improper access control in the firmware of WSR-1166DHP3 and WSR-1166DHP4 routers, enabling unauthorized access to configuration details.

The Impact of CVE-2021-20730

The vulnerability could lead to a potential data breach, allowing attackers to extract sensitive configuration information from the affected routers.

Technical Details of CVE-2021-20730

CVE-2021-20730 has the following technical details:

Vulnerability Description

The vulnerability arises due to improper access control in WSR-1166DHP3 firmware Ver.1.16 and earlier, as well as WSR-1166DHP4 firmware Ver.1.02 and prior, facilitating information disclosure.

Affected Systems and Versions

Products impacted include WSR-1166DHP3 and WSR-1166DHP4 running firmware versions up to WSR-1166DHP3 Ver.1.16 and WSR-1166DHP4 Ver.1.02.

Exploitation Mechanism

Attackers can exploit this vulnerability through unspecified attack vectors to access sensitive configuration data.

Mitigation and Prevention

To address CVE-2021-20730, consider the following security measures:

Immediate Steps to Take

Update the firmware of affected routers to the latest patched versions.
Restrict network access to vulnerable devices.

Long-Term Security Practices

Regularly monitor security advisories from BUFFALO INC.
Implement network segmentation to contain potential security breaches.

Patching and Updates

BUFFALO INC. has released updated firmware versions with security fixes. Ensure timely installation of these patches to mitigate the vulnerability.