CVE-2022-30525VulnerabilityPublished 05/16/2022Updated 10/24/2026

CVE-2022-30525: Zyxel Multiple Firewalls OS Command Injection Vulnerability

Affects Zyxel Multiple FirewallsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 05/16/2022
KEV deadline: 06/06/2022
EPSS: 99.9% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2022-30525 (opens in a new tab)

Description

CVE-2022-30525 is a command injection vulnerability affecting certain Zyxel firewall devices. The flaw exists in a CGI program, allowing attackers to modify files and execute operating system commands on vulnerable devices. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided.

Summary

This vulnerability involves command injection in a CGI program of some Zyxel firewall versions. An attacker can leverage this flaw to alter specific files and execute OS commands on the device, potentially compromising the firewall. The vulnerability is tracked as CVE-2022-30525 and has been observed in active exploitation scenarios. No detailed version or patch data is available from the provided information.

Impact

Successful exploitation allows an attacker to execute arbitrary OS commands on affected Zyxel firewall devices, leading to potential full compromise of the device. This could result in unauthorized access, control over network traffic, and disruption of firewall operations. The vulnerability is known to be exploited in the wild, indicating active threat.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict access to the firewall management interfaces and monitor for suspicious activity related to CGI program usage.

Weaknesses

CWE-78OS Command Injection (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 11:40:41 UTC

Weaknesses

References

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