CVE-2023-0457Network attack vector

Server credential disclosure via plaintext project files

Published Mar 3, 2023 · Updated Mar 5, 2025

Plaintext password storage in Mitsubishi Electric MELSEC controller project files allows remote attackers to obtain FTP or web credentials. Project files retain configured server passwords without encryption, so access to a transmitted or shared file exposes the credentials directly. No device authentication is needed to use the disclosed credentials, which permit login to the configured FTP or web service.

CVSS severity7.5
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Plaintext password storage in Mitsubishi Electric MELSEC controller project files allows remote attackers to obtain FTP or web credentials. Project files retain configured server passwords without encryption, so access to a transmitted or shared file exposes the credentials directly. No device authentication is needed to use the disclosed credentials, which permit login to the configured FTP or web service.

The record

CVE
CVE-2023-0457
Published
Mar 3, 2023
Updated
Mar 5, 2025
Vendor
Mitsubishi Electric Corporation
Product
MELSEC iQ-R Series R32CPU CPU Module
Classifications
CWE-522, CWE-256, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 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

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.

  1. Affected versionversion=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mitsubishi Electric Corporation · MELSEC iQ-R Series R32CPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q04UDPVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L02CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L26CPU-PBTversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-60MR/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-64MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R32ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-60MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-32MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R120SFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-80MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-40MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-30MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R16PCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-64MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series QJ71E71-100version=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q50UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-32MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-60MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q06UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-32MT/Dversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-64MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R120PCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q10UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L26CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-60MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R16ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-80MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R08ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-32MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-40MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R16SFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R32PCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-60MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L02CPU-Pversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-24MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q26UDVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R00CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Ethernet Interface Module RJ71EN71version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-80MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R04ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-40MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-80MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R08PSFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-32MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q13UDVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-32MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-64MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-60MT/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-32MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-40MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R120ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-64MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-60MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q06UDVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-30MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-80MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q13UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-24MR/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R120PSFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R120CPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-64MT/Dversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q04UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-32MR/DS-TSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-24MT/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-40MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-32MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-80MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-60MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-64MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q03UDVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q13UDPVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R04CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-32MT/DS-TSversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L26CPU-Pversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-80MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-80MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R08PCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q03UDECPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R08SFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L06CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5-ENET/IPversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L26CPU-BTversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-40MR/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-96MT/Dversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5U-64MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R01CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series Ethernet Interface Module LJ71E71-100version=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q04UDVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-24MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC-L Series L06CPU-Pversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R12CCPU-Vversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R16PSFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q06UDPVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q20UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q26UDPVCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q100UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-40MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-30MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R32PSFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC-Q Series Q26UDEHCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series CPU Module R08CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R32SFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-24MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5-ENETversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-96MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R02CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UC-32MT/DSS-TSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5UJ-40MT/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R16CPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series FX5S-80MR/ESversion=all versions

Published CVSS scores

7.5Mitsubishi Electric CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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 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-522Insufficiently Protected Credentials
CWE-256Plaintext Storage of a Password
T1552.001Unsecured Credentials: Credentials In Files

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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