HOMEVULNERABILITIESCVE-2022-38546
CRITICAL

CVE-2022-38546

CWE-284Published: December 21, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2022-38546 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

zyxel2 product(s)
nbg7510 firmwarenbg7510
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (2)

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

Quick Facts

CVE IDCVE-2022-38546
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-284
CISA KEVNo
Affected1 vendor(s)
PublishedDec 21, 2022

Related CVEs (CWE-284)

CVE-2026-50746
10.0
CVE-2016-1038
10.0
CVE-2026-35308
10.0
CVE-2015-3306
10.0
CVE-2026-58630
10.0
CVE-2016-1041
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-38546 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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