CVE-2024-1220Network attack vector

Unauthenticated service interruption via crafted web payload

Published Mar 6, 2024 · Updated Aug 23, 2024

Stack-based buffer overflow in Moxa NPort W2150A/W2250A firmware 2.3 and earlier allows remote attackers to interrupt its web service. The built-in web server writes a crafted web-service payload beyond a stack buffer, but Moxa has not identified the affected request handler or field. No authentication or user interaction is required, and the documented consequence is limited to denial of service; code execution has not been reported.

CVSS severity8.2
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Moxa NPort W2150A/W2250A firmware 2.3 and earlier allows remote attackers to interrupt its web service. The built-in web server writes a crafted web-service payload beyond a stack buffer, but Moxa has not identified the affected request handler or field. No authentication or user interaction is required, and the documented consequence is limited to denial of service; code execution has not been reported.

The record

CVE
CVE-2024-1220
Published
Mar 6, 2024
Updated
Aug 23, 2024
Vendor
Moxa
Product
NPort W2150A/W2250A Series
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 23, 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 <=2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moxa · NPort W2150A/W2250A Seriesversion=1.0 <=2.3

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2Moxa Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

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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