CVE-2023-4929Network attack vector

Device takeover via insufficient firmware integrity checks

Published Oct 3, 2023 · Updated Sep 23, 2024

Improper integrity validation in Moxa NPort 5000 Series firmware allows remote authenticated users to take device control through updates. The firmware update and upgrade path performs insufficient integrity checks before accepting an image, allowing manipulated firmware to replace trusted device code. Administrative privileges and network access are required; successful installation grants control of the appliance and can alter or interrupt serial-network functions.

CVSS severity6.5

Medium

EPSS probability0.26%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2023-4929
Published: Oct 3, 2023
Updated: Sep 23, 2024

Vendor: Moxa
Product: NPort IA5000 Series
Classifications: CWE-354, CAPEC-145, T1601

Attack vector: network
Privileges: admin

Timeline

How it unfolded

Oct 3, 2023CVE publishedPublication date reported by the CVE source.
Sep 23, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

Affected versionversion=1.0 <=2.1

What conditions does exploitation require?

Attack vectornetwork

Required privilegesadmin

What is affected?

Moxa · NPort IA5000 Seriesversion=1.0 <=2.1

Moxa · NPort IA5000A Seriesversion=1.0 <=2.0

Moxa · NPort IA5000A-I/O Seriesversion=1.0 <=2.0

Moxa · NPort P5150Aversion=1.0 <=1.6

Moxa · NPort 5600 Seriesversion=1.0 <=3.11

Moxa · NPort IAW5000A-I/O Seriesversion=1.0 <=2.2

Moxa · NPort P5150A Seriesversion=1.0 <=1.6

Moxa · NPort 5600-DT Seriesversion=1.0 <=2.9

Moxa · NPort 5000AI-M12 Seriesversion=1.0 <=1.5

Moxa · NPort 5200 Seriesversion=1.0 <=2.12

Moxa · NPort 5100A Seriesversion=1.0 <=1.6

Moxa · NPort 5400 Seriesversion=1.0 <=3.14

Moxa · NPort 5100 Seriesversion=1.0 <=3.10

Moxa · NPort 5200A Seriesversion=1.0 <=1.6; version=1.0 <=2.12

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5MoxaCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

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

Privilegesadmin

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-354Improper Validation of Integrity Check Value

CAPEC-145Checksum Spoofing

T1601Modify System Image

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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