Is CVE-2023-27992 actively exploited?

CVE-2023-27992 has no public evidence of in-the-wild exploitation as of 2025-10-27.

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

CVE-2023-27992 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2023-27992?

Patch guidance is available from zyxel security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-27992.

Fix CVE-2023-27992 - CRITICAL zyxel nas326 firmware

Q: Which products are affected by CVE-2023-27992?

3 products: zyxel nas326 firmware, zyxel nas540 firmware, zyxel nas542 firmware.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-78 · OS Command Injection CWE-78 · OS Command Injection

Metadata

Primary Vendor: ZYXEL
Published: 6/19/2023
Last Modified: 10/27/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2023-27992

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary