CVE-2023-4230Network attack vector

Information disclosure via HTTP server banner

Published Aug 24, 2023 · Updated Oct 2, 2024

Server banner information disclosure in Moxa ioLogik 4000 Series firmware 1.6 and earlier allows remote attackers to collect device details. The built-in web service exposes a server banner through improperly configured or implemented HTTP headers instead of suppressing identifying information. Unauthenticated network access to the web service is sufficient; the disclosed details support reconnaissance, with no reported write or service-interruption impact.

CVSS severity5.3
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server banner information disclosure in Moxa ioLogik 4000 Series firmware 1.6 and earlier allows remote attackers to collect device details. The built-in web service exposes a server banner through improperly configured or implemented HTTP headers instead of suppressing identifying information. Unauthenticated network access to the web service is sufficient; the disclosed details support reconnaissance, with no reported write or service-interruption impact.

The record

CVE
CVE-2023-4230
Published
Aug 24, 2023
Updated
Oct 2, 2024
Vendor
Moxa
Product
ioLogik 4000 Series
Classifications
CWE-200, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0 <=1.6
  2. Affected versionversion=1.0 <1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moxa · ioLogik 4000 Seriesversion=1.0 <=1.6; version=1.0 <1.6

Published CVSS scores

5.3Moxa Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1046Network Service Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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