Actively exploited in the wild
Zyxel Multiple Firewalls OS Command Injection Vulnerability
Zyxel - Multiple Firewalls · Listed in the CISA KEV since 2022-05-16. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2022-30525
CriticalCVSS 9.8KEVSummary
A OS command injection vulnerability exists in the CGI program of Zyxel USG FLEX, ATP, and VPN series firmware. It allows an attacker to modify specific files and execute OS commands on the vulnerable device. Affected versions include USG FLEX 100(W) 5.00-5.21 Patch 1, USG FLEX 200, 500, 700, USG FLEX 50(W), USG20(W)-VPN, ATP, and VPN series.
Risk Assessment
An attacker can gain full control of the Zyxel device, potentially leading to network security compromise and traffic interception.
Recommendation
Update Zyxel device firmware to a patched version and restrict access to the administrative interface.
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Original NVD description (English source)
A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS