CVE-2023-2063Network attack vector

Configuration disclosure and disruption via unrestricted FTP transfers

Published Jun 2, 2023 · Updated Mar 5, 2025

Unrestricted file upload in MELSEC RJ71EIP91 and FX5-ENET/IP allows remote authenticated users to alter communication settings. The modules' FTP function does not restrict uploaded or downloaded file types, so a logged-in user can read, overwrite, or delete communication configuration files. A valid FTP login is required for this flaw alone; altered settings can stop communications or trigger unintended communications after a reboot.

CVSS severity6.3
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in MELSEC RJ71EIP91 and FX5-ENET/IP allows remote authenticated users to alter communication settings. The modules' FTP function does not restrict uploaded or downloaded file types, so a logged-in user can read, overwrite, or delete communication configuration files. A valid FTP login is required for this flaw alone; altered settings can stop communications or trigger unintended communications after a reboot.

The record

CVE
CVE-2023-2063
Published
Jun 2, 2023
Updated
Mar 5, 2025
Vendor
Mitsubishi Electric Corporation
Product
MELSEC iQ-F Series Ethernet/IP Module FX5-ENET/IP
Classifications
CWE-434, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2025Record 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=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mitsubishi Electric Corporation · MELSEC iQ-F Series Ethernet/IP Module FX5-ENET/IPversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series EtherNet/IP Module RJ71EIP91version=all versions

Published CVSS scores

6.3Mitsubishi Electric CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
7.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1565.001Stored Data Manipulation

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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