CVE-2021-20712 : Vulnerability Insights and Analysis
Learn about CVE-2021-20712, an access control vulnerability in NEC Aterm devices allowing LAN-to-WAN access, its impact, and mitigation steps to secure affected systems.
This CVE (Common Vulnerabilities and Exposures) details an improper access control vulnerability found in NEC Aterm devices. Read on to understand the impact, technical details, and mitigation strategies related to CVE-2021-20712.
Understanding CVE-2021-20712
CVE-2021-20712 outlines a security flaw in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, as well as Aterm WX3000HP firmware Ver1.1.2 and earlier, that allows unauthorized access from the WAN side due to a defect in the IPv6 firewall function.
What is CVE-2021-20712?
The vulnerability in CVE-2021-20712 enables a device on the LAN side to be reachable from the WAN side due to inadequate access control mechanisms.
The Impact of CVE-2021-20712
This vulnerability could potentially lead to unauthorized access to sensitive devices or data connected to the affected NEC Aterm devices, posing a significant security risk.
Technical Details of CVE-2021-20712
This section provides crucial technical information regarding the vulnerability.
Vulnerability Description
The issue arises from a flaw in the IPv6 firewall function of the NEC Aterm WG2600HS and Aterm WX3000HP firmware versions specified.
Affected Systems and Versions
NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by leveraging the flaw in the IPv6 firewall function to gain unauthorized access from the WAN side.
Mitigation and Prevention
Discover the steps to address and prevent CVE-2021-20712 effectively.
Immediate Steps to Take
Consider implementing network segmentation, firewall rules, and access control measures to restrict unauthorized access to network devices.
Long-Term Security Practices
Regularly update firmware, monitor network traffic for anomalies, and educate users on secure network practices to enhance overall cybersecurity posture.
Patching and Updates
Stay informed about security advisories from NEC Corporation regarding firmware updates to address the vulnerability.