CVE-2023-2061Network attack vector

Unauthenticated FTP access via hard-coded password

Published Jun 2, 2023 · Updated Mar 5, 2025

Hard-coded password use in all Mitsubishi Electric MELSEC RJ71EIP91 and FX5-ENET/IP modules allows remote attackers to access the modules via FTP. The FTP authentication path uses a fixed password embedded in the affected modules, allowing the recovered credential to bypass normal login controls. Network reachability to FTP is required; successful access exposes module files and communication settings, while this CVE does not cover modification or service interruption.

CVSS severity7.5
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded password use in all Mitsubishi Electric MELSEC RJ71EIP91 and FX5-ENET/IP modules allows remote attackers to access the modules via FTP. The FTP authentication path uses a fixed password embedded in the affected modules, allowing the recovered credential to bypass normal login controls. Network reachability to FTP is required; successful access exposes module files and communication settings, while this CVE does not cover modification or service interruption.

The record

CVE
CVE-2023-2061
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-259, CWE-798, T0859
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

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

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.2Mitsubishi Electric CorporationCVSS:3.1/AV:L/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-259Use of Hard-coded Password
CWE-798Use of Hard-coded Credentials
T0859Valid Accounts

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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