CVE-2022-43390 : What You Need to Know

A command injection vulnerability in the CGI program of Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0 could allow an authenticated attacker to execute OS commands on a vulnerable device by sending a crafted HTTP request.

Understanding CVE-2022-43390

This section provides insights into the critical aspects of CVE-2022-43390.

What is CVE-2022-43390?

CVE-2022-43390 is a command injection vulnerability in Zyxel NR7101 firmware that enables authenticated attackers to run OS commands through a manipulated HTTP request.

The Impact of CVE-2022-43390

The vulnerability poses a medium severity risk with a CVSS base score of 5.4. Attackers can exploit this flaw to execute unauthorized commands, potentially leading to data loss or system compromise.

Technical Details of CVE-2022-43390

Explore the specific technical details related to CVE-2022-43390.

Vulnerability Description

CVE-2022-43390 is categorized as CWE-78, indicating improper neutralization of special elements in OS commands, allowing for command injection.

Affected Systems and Versions

Zyxel NR7101 firmware versions earlier than V1.15(ACCC.3)C0 are impacted by this vulnerability.

Exploitation Mechanism

By crafting a malicious HTTP request, authenticated threat actors can exploit the vulnerability to execute unauthorized OS commands.

Mitigation and Prevention

Learn how to address and prevent the risks associated with CVE-2022-43390.

Immediate Steps to Take

To mitigate the risk, users should update the Zyxel NR7101 firmware to version V1.15(ACCC.3)C0 or above and restrict network access to the device.

Long-Term Security Practices

Maintain regular security updates, conduct security assessments, and monitor network traffic to detect and prevent unauthorized activities.

Patching and Updates

Stay informed about security advisories from Zyxel and promptly apply patches and updates to ensure the protection of your devices.