TI-2023-16201 Aliases CVE-2023-33013 GHSA-xw24-fjv7-8w94

OS command injection in Zyxel NBG6604 firmware

MEDIUM 43CWE-78Published 2023-08-14 · Updated 2024-10-09

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

A post-authentication command injection vulnerability in the NTP feature of Zyxel NBG6604 firmware version V1.01(ABIR.1)C0 could allow an authenticated attacker to execute some OS commands remotely by sending a crafted HTTP request.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01682 77th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
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	NBG6604 firmware	V1.01(ABIR.1)C0	—	No fix listed	CNA

NBG6604 firmware VendorZyxel Affected V1.01(ABIR.1)C0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:zyxel:nbg6604_firmware:1.01\(abir.1\)c0:::::::*	1.01(abir.1)c0	Vulnerable	Zyxel
cpe:2.3:h:zyxel:nbg6604:-:::::::*	not specified by NVD	Running on	Zyxel

cpe:2.3:o:zyxel:nbg6604_firmware:1.01\(abir.1\)c0:*:*:*:*:*:*:* Versions 1.01(abir.1)c0 Vulnerable ·Zyxel
cpe:2.3:h:zyxel:nbg6604:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-33013
2026-10-03 Alias added: GHSA-xw24-fjv7-8w94

References

Patch 1

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-in-ntp-feature-of-nbg6604-home-router

TI-2023-09057 OS command injection in Zyxel NBG6604 firmware CVSS 3.1HIGH 8.8
TI-2021-14000 Insufficient session expiration in Zyxel NBG6604 series firmware CVSS 3.1CRITICAL 9.1
TI-2021-14001 Cleartext storage of sensitive information in Zyxel NBG6604 series firmware CVSS 3.1MEDIUM 6.5

Sources

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