CVE-2023-28769

Name: CVE-2023-28769
Creator: NVD / NIST
Published: 2023-04-27T09:15:09.057+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 5.42%

Last modified Jun 17, 2026

CVE-2023-28769 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The buffer overflow vulnerability in the library “libclinkc.so” of the web server “zhttpd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.. EPSS estimates a 5.42% chance of exploitation in the next 30 days.

Description

The buffer overflow vulnerability in the library “libclinkc.so” of the web server “zhttpd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

5.42%

91.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zyxel	Dx5401-B0 Firmware	< 5.17\(abyo.1\)c0

References

Timeline

Published: Apr 27, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28769?

How severe is CVE-2023-28769?

CVE-2023-28769 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.42% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28769?

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-2023-28769?

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

Scan your code now

Source: NVD / NIST