CVE-2021-20861 Explained : Impact and Mitigation
Uncover the details of CVE-2021-20861, an improper access control vulnerability in ELECOM LAN routers allowing unauthorized access. Learn about the impact, affected systems, exploitation, and mitigation steps.
A vulnerability has been identified in ELECOM LAN routers, allowing a network-adjacent authenticated attacker to bypass access restrictions.
Understanding CVE-2021-20861
This CVE identifies an improper access control vulnerability in ELECOM LAN routers, potentially leading to unauthorized access to the product's management screen.
What is CVE-2021-20861?
The CVE-2021-20861 vulnerability in ELECOM LAN routers enables a network-adjacent authenticated attacker to circumvent access restrictions and gain access to the device's management interface through unspecified means.
The Impact of CVE-2021-20861
The impact of this vulnerability is significant as it could allow malicious actors to manipulate router settings and potentially compromise the security and privacy of the affected systems.
Technical Details of CVE-2021-20861
This section provides more insight into the vulnerability affecting ELECOM LAN routers.
Vulnerability Description
The vulnerability arises from improper access controls, enabling an authenticated attacker in close proximity to the network to infiltrate the device's management console.
Affected Systems and Versions
ELECOM LAN routers with specific firmware versions, including WRC-1167GST2, WRC-2533GS2, WRC-1750GS, WRC-1900GST, and more, are vulnerable to CVE-2021-20861.
Exploitation Mechanism
The exact vectors through which an attacker can exploit this vulnerability remain unspecified.
Mitigation and Prevention
Protecting your network from CVE-2021-20861 involves taking immediate action and adopting long-term security measures.
Immediate Steps to Take
It is recommended to monitor vendor updates closely, restrict network access to vulnerable devices, and implement strong authentication mechanisms.
Long-Term Security Practices
Employ network segmentation, regularly update router firmware, conduct security audits, and train users on security best practices.
Patching and Updates
Apply patches and security updates provided by ELECOM to eliminate the vulnerability and enhance the overall security posture of your network.