HOMEVULNERABILITIESCVE-2023-22920
CRITICAL

CVE-2023-22920

CWE-284Published: February 21, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A security misconfiguration vulnerability exists in the Zyxel LTE3316-M604 firmware version V2.00(ABMP.6)C0 due to a factory default misconfiguration intended for testing purposes. A remote attacker could leverage this vulnerability to access an affected device using Telnet.

NVD Source

Technical Analysis

CVE-2023-22920 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

zyxel4 product(s)
lte3202-m437 firmwarelte3202-m437lte3316-m604 firmwarelte3316-m604
Source: NVD CPE · 4 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
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-security-misconfiguration-vulnerability-of-4g-lte-indoor-routers
ADVISORYhttps://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-security-misconfiguration-vulnerability-of-4g-lte-indoor-routers

All References (2)

→
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-security-misconfiguration-vulnerability-of-4g-lte-indoor-routersVendor Advisory
→
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-security-misconfiguration-vulnerability-of-4g-lte-indoor-routersVendor Advisory

Quick Facts

CVE IDCVE-2023-22920
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-284
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 21, 2023

Related CVEs (CWE-284)

CVE-2015-3062
10.0
CVE-2015-3063
10.0
CVE-2015-0929
10.0
CVE-2015-3060
10.0
CVE-2015-3061
10.0
CVE-2015-3064
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-22920 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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