CVE-2020-9054VulnerabilityPublished 03/25/2022Updated 10/24/2026

CVE-2020-9054: Zyxel Multiple NAS Devices OS Command Injection Vulnerability

Affects Zyxel Multiple Network-Attached Storage (NAS) DevicesSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/25/2022
KEV deadline: 04/15/2022
EPSS: 100.0% 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-2020-9054 (opens in a new tab)

Description

Multiple Zyxel network-attached storage (NAS) devices have a pre-authentication OS command injection vulnerability (CVE-2020-9054) that allows remote unauthenticated attackers to execute arbitrary code. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided.

Summary

CVE-2020-9054 is a pre-authentication OS command injection vulnerability affecting multiple Zyxel NAS devices. It allows remote attackers to execute arbitrary code without authentication. The vulnerability is known to be exploited in the wild, indicating active threat. No vendor advisory or patch information is provided in the input data.

Impact

Remote unauthenticated attackers can execute arbitrary code on affected Zyxel NAS devices, potentially leading to full system compromise. This can result in unauthorized access, data theft, or device control.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict network access to affected devices and monitor for suspicious activity.

Weaknesses

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

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 11:10:55 UTC

Weaknesses

References

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