CRITICAL CISA KEV

CVE-2023-27992

CVSS v3

9.8

CRITICAL

EPSS Score

86.5%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.

CISA Known Exploited Vulnerability

Date Added
6/23/2023
Patch Due Date
7/14/2023
Ransomware Use
Unknown

Technical details

Published
6/19/2023

Frequently asked questions

What is CVE-2023-27992?

The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.

Is CVE-2023-27992 actively exploited?

Yes. CVE-2023-27992 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 7/14/2023.

What is the CVSS score for CVE-2023-27992?

CVE-2023-27992 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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