CVE-2021-20854 : Exploit Details and Defense Strategies
Learn about CVE-2021-20854 impacting ELECOM LAN routers, allowing attackers to run arbitrary OS commands. Find out the impact, technical details, and mitigation steps here.
ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allow a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands. Learn about the impact, technical details, and mitigation steps related to CVE-2021-20854.
Understanding CVE-2021-20854
This section provides insights into the nature and implications of CVE-2021-20854.
What is CVE-2021-20854?
CVE-2021-20854 involves ELECOM LAN routers with specific firmware versions that permit an attacker to run commands on the operating system.
The Impact of CVE-2021-20854
The vulnerability enables a network-adjacent attacker with admin rights to execute unauthorized OS commands, posing a severe security risk.
Technical Details of CVE-2021-20854
Explore the technical aspects associated with CVE-2021-20854 giving a deeper understanding of the vulnerability.
Vulnerability Description
The flaw in ELECOM LAN routers allows for the injection of arbitrary OS commands by a malicious actor with network access.
Affected Systems and Versions
ELECOM LAN routers running WRH-733GBK firmware v1.02.9 and earlier, as well as WRH-733GWH firmware v1.02.9 and earlier, are impacted by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by an attacker with admin privileges who is located adjacent to the network, enabling them to execute unauthorized commands.
Mitigation and Prevention
Discover how to mitigate the risks associated with CVE-2021-20854 and implement long-term security practices.
Immediate Steps to Take
Immediately update the affected ELECOM LAN routers to the latest firmware version supplied by the vendor to eliminate the vulnerability.
Long-Term Security Practices
To ensure ongoing security, maintain regular patch management practices, monitor router security advisories, and restrict network access to authorized users only.
Patching and Updates
Regularly check for firmware updates and security bulletins from ELECOM CO.,LTD. and apply patches promptly to safeguard your network against potential threats.