TI-2022-18134 Aliases CVE-2022-38546 GHSA-pmr6-wh49-g8wf

Improper access control in Zyxel NBG7510 firmware

MEDIUM 49CWE-284Published 2022-12-21 · Updated 2025-04-15

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

A DNS misconfiguration was found in Zyxel NBG7510 firmware versions prior to V1.00(ABZY.3)C0, which could allow an unauthenticated attacker to access the DNS server when the device is switched to the AP mode.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00659 51st percentileScored 2026-11-07

Fix Fixed NBG7510 firmware (Zyxel): V1.00(ABZY.3)C0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

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	NBG7510 firmware	before V1.00(ABZY.3)C0	V1.00(ABZY.3)C0	Patch available	CNA

NBG7510 firmware VendorZyxel Affected before V1.00(ABZY.3)C0 Fixed in V1.00(ABZY.3)C0 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:zyxel:nbg7510_firmware::::::::	up to 1.00\(abzy.2\)c0	Vulnerable	Zyxel
cpe:2.3:h:zyxel:nbg7510:-:::::::*	not specified by NVD	Running on	Zyxel

cpe:2.3:o:zyxel:nbg7510_firmware:*:*:*:*:*:*:*:* Versions up to 1.00\(abzy.2\)c0 Vulnerable ·Zyxel
cpe:2.3:h:zyxel:nbg7510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

Fix · CNA NBG7510 firmware (Zyxel) Fixed in V1.00(ABZY.3)C0

Timeline

2026-10-02 Threatist record created from CVE-2022-38546
2026-10-03 Alias added: GHSA-pmr6-wh49-g8wf
2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 1

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-dns-misconfiguration-in-nbg7510-home-router

TI-2023-19362 Buffer overflow in Zyxel V5.50 C0 firmware CVSS 3.1MEDIUM 6.5
TI-2024-00753 Buffer overflow in Zyxel DX3300-T1 firmware CVSS 3.1MEDIUM 5.5

Sources

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