CVE-2021-38454Network attack vector

Code execution via path traversal file overwrite

Published Oct 12, 2021 · Updated Sep 16, 2024

Path traversal in Moxa MXview 3.x through 3.2.2 allows remote attackers to overwrite executable files via crafted paths. The application accepts an attacker-controlled pathname without confining resolution to its intended directory; public advisories do not identify the affected endpoint or function. Unauthenticated network access is sufficient, and overwriting a program or library can cause attacker-supplied code to run when that file is loaded.

CVSS severity10.0
Critical
EPSS probability15.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Moxa MXview 3.x through 3.2.2 allows remote attackers to overwrite executable files via crafted paths. The application accepts an attacker-controlled pathname without confining resolution to its intended directory; public advisories do not identify the affected endpoint or function. Unauthenticated network access is sufficient, and overwriting a program or library can cause attacker-supplied code to run when that file is loaded.

The record

CVE
CVE-2021-38454
Published
Oct 12, 2021
Updated
Sep 16, 2024
Vendor
Moxa
Product
MXview
Classifications
CWE-284, CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=3.x <=3.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moxa · MXviewversion=3.x <=3.2.2

Published CVSS scores

10.0ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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-284Improper Access Control
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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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