TI-2023-13279 Aliases CVE-2023-28769 GHSA-xg39-26cw-gxj9

Buffer overflow in Zyxel DX5401-B0 firmware

MEDIUM 57CWE-120Published 2023-04-27 · Updated 2025-01-31

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0542 92nd percentileScored 2026-11-07

Fix Fixed DX5401-B0 firmware (Zyxel): V5.17(ABYO.1)C0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Zyxel	DX5401-B0 firmware	before V5.17(ABYO.1)C0	V5.17(ABYO.1)C0	Patch available	CNA

DX5401-B0 firmware VendorZyxel Affected before V5.17(ABYO.1)C0 Fixed in V5.17(ABYO.1)C0 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:zyxel:dx5401-b0_firmware::::::::	before 5.17\(abyo.1\)c0	Vulnerable	Zyxel
cpe:2.3:h:zyxel:dx5401-b0:-:::::::*	not specified by NVD	Running on	Zyxel

cpe:2.3:o:zyxel:dx5401-b0_firmware:*:*:*:*:*:*:*:* Versions before 5.17\(abyo.1\)c0 Vulnerable ·Zyxel
cpe:2.3:h:zyxel:dx5401-b0:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

Fix · CNA DX5401-B0 firmware (Zyxel) Fixed in V5.17(ABYO.1)C0

Timeline

2026-10-02 Threatist record created from CVE-2023-28769
2026-10-03 Alias added: GHSA-xg39-26cw-gxj9

References

Advisory 1

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities

TI-2023-13280 Information disclosure in Zyxel DX5401-B0 firmware CVSS 3.1HIGH 7.5
TI-2025-07956 OS command injection in Zyxel DX3300-T0 firmware CVSS 3.1HIGH 8.8
TI-2022-21188 OS command injection in Zyxel NR7101 firmware CVSS 3.1HIGH 8.8
TI-2024-05028 Buffer overflow in Zyxel VMG8825-T50K firmware CVSS 3.1HIGH 7.5
TI-2025-05994 Uncontrolled resource consumption in Zyxel DX3301-T0 firmware CVSS 3.1HIGH 7.5
TI-2024-08115 Buffer overflow in Zyxel VMG8825-T50K firmware CVSS 3.1HIGH 7.5

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences