CVE-2023-27988

Name: CVE-2023-27988
Creator: NVD / NIST
Published: 2023-05-30T02:15:33.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.42%

Last modified Jun 17, 2026

CVE-2023-27988 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. The post-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.13)C0 could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands on an affected device remotely.. EPSS estimates a 1.42% chance of exploitation in the next 30 days.

Description

The post-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.13)C0 could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands on an affected device remotely.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.42%

69.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zyxel	Nas326 Firmware	< 5.21\(aazf.13\)c0
Zyxel	Nas540 Firmware	< 5.21\(aatb.10\)c0
Zyxel	Nas542 Firmware	< 5.21\(abag.10\)c0

References

Timeline

Published: May 30, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-27988?

How severe is CVE-2023-27988?

CVE-2023-27988 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.

How do I fix CVE-2023-27988?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-27988?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST