CVE-2024-6787Network attack vector

Authenticated arbitrary file write via MQTT race

Published Sep 21, 2024 · Updated Sep 26, 2024

TOCTOU in Moxa MXview One Series 1.4.0 and earlier allows remote authenticated users to write arbitrary files through MQTT messages. The MQTT file-handling path separates its destination check from the later write, allowing a race to replace the checked file before use. Valid service credentials and precise race timing are required; successful exploitation overwrites files and enables malicious code execution.

CVSS severity6.0
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

TOCTOU in Moxa MXview One Series 1.4.0 and earlier allows remote authenticated users to write arbitrary files through MQTT messages. The MQTT file-handling path separates its destination check from the later write, allowing a race to replace the checked file before use. Valid service credentials and precise race timing are required; successful exploitation overwrites files and enables malicious code execution.

The record

CVE
CVE-2024-6787
Published
Sep 21, 2024
Updated
Sep 26, 2024
Vendor
Moxa
Product
MXview One Series
Classifications
CWE-367, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=0 <1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moxa · MXview One Seriesversion=0 <1.4

Published CVSS scores

5.3MoxaCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
6.0MoxaCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1190Exploit Public-Facing Application

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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