CVE-2021-4030 : What You Need to Know
Learn about CVE-2021-4030, a high-severity cross-site request forgery vulnerability in Zyxel ARMOR Z1/Z2 firmware allowing command execution. Find out the affected systems and mitigation steps.
A cross-site request forgery vulnerability in the HTTP daemon of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary commands if they coerce or trick a local user to visit a compromised website with malicious scripts.
Understanding CVE-2021-4030
This CVE has a high CVSS base score of 8.0, indicating a serious impact on affected systems.
What is CVE-2021-4030?
CVE-2021-4030 is a cross-site request forgery vulnerability found in Zyxel ARMOR Z1/Z2 firmware, potentially enabling attackers to run arbitrary commands through malicious websites.
The Impact of CVE-2021-4030
The vulnerability has a high severity level and can result in unauthorized command execution on compromised devices, posing a significant risk to confidentiality, integrity, and availability.
Technical Details of CVE-2021-4030
This section provides in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability lies in the HTTP daemon of Zyxel ARMOR Z1/Z2 firmware, allowing threat actors to trigger malicious commands via coerced user interaction.
Affected Systems and Versions
Zyxel ARMOR Z1 (NBG6816) firmware version 1.00(AAWB.10)C0 and Zyxel ARMOR Z2 (NBG6817) firmware version 1.00(ABCS.10)C0 are affected by this vulnerability.
Exploitation Mechanism
Exploiting this vulnerability requires luring a local user to visit a compromised website where malicious scripts are present, facilitating the execution of unauthorized commands.
Mitigation and Prevention
Discover effective strategies to mitigate the risks associated with CVE-2021-4030.
Immediate Steps to Take
Users are advised to update their Zyxel ARMOR Z1/Z2 firmware to the patched versions to eliminate this vulnerability.
Long-Term Security Practices
Implement secure browsing habits and ensure users are cautious when interacting with untrusted websites to prevent CSRF attacks.
Patching and Updates
Regularly check for firmware updates from Zyxel and promptly apply patches to protect against known vulnerabilities.