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Melsec Iq R Rd81mes96n FirmwareOperating system · Mitsubishi

CVE-2022-25163

CRITICAL · 9.8 CVSS v3.1 Published 2022-06-02
Fix available
A fix is available. Upgrade to 09 / 24062 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Improper Input Validation vulnerability in Mitsubishi Electric MELSEC-Q Series QJ71E71-100 first 5 digits of serial number "24061" or prior, Mitsubishi Electric MELSEC-L series LJ71E71-100 first 5 digits of serial number "24061" or prior and Mitsubishi Electric MELSEC iQ-R Series RD81MES96N firmware version "08" or prior allows a remote unauthenticated attacker to cause a denial of service (DoS) condition or execute malicious code on the target products by sending specially crafted packets.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Improper input validation vulnerability in Mitsubishi Electric MELSEC-Q Series QJ71E71-100, MELSEC-L Series LJ71E71-100, and MELSEC iQ-R Series RD81MES96N Ethernet interface modules allows remote unauthenticated attackers to send specially crafted packets that can cause denial of service or execute arbitrary code on affected devices.

MitigationUpgrade firmware to version 09 or later for iQ-R series, or obtain units with serial numbers beyond '24061' for Q and L series; implement network segmentation and firewall controls to limit exposure to untrusted networks as compensating measures.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Melsec Iq R Rd81mes96n FirmwareOperating system
Affected:< 09
Melsec Qj71e71 100 FirmwareOperating system
Affected:< 24062
Melsec Lj71e71 100 FirmwareOperating system
Affected:< 24062

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Mitsubishi Ethernet module models on the network
    Inventory network devices to locate MELSEC-Q Series QJ71E71-100, MELSEC-L Series LJ71E71-100, or MELSEC iQ-R Series RD81MES96N modules. Check device labels, SNMP inventory, or network scans for these model numbers.
    Affected if Any of these three model numbers are present in the environment
  2. Check iQ-R RD81MES96N firmware version
    Access the module via web interface, GX Works3 engineering software, or SNMP to retrieve the firmware version. Compare against the affected version range: < 09.
    Affected if Firmware version is below 09 (e.g., 01-08)
  3. Check QJ71E71-100 firmware version
    Access the QJ71E71-100 module via web interface, GX Developer/GT Works3, or SNMP to retrieve the firmware version. Compare against the affected version range: < 24062.
    Affected if Firmware version is below 24062 (e.g., versions ending in 24061 or earlier)
  4. Check LJ71E71-100 firmware version
    Access the LJ71E71-100 module via web interface, GX Works3, or SNMP to retrieve the firmware version. Compare against the affected version range: < 24062.
    Affected if Firmware version is below 24062 (e.g., versions ending in 24061 or earlier)

The environment is affected if any of the three model numbers are present AND their firmware versions are below the specified thresholds (09 for iQ-R, 24062 for Q and L series).

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 09 / 24062 or later
Fixed in 0924062
Interim mitigation

Upgrade firmware to version 09 or later for iQ-R series, or obtain units with serial numbers beyond '24061' for Q and L series; implement network segmentation and firewall controls to limit exposure to untrusted networks as compensating measures.

Recommended fix High confidence

RD81MES96N: firmware version 09; QJ71E71-100: serial number 24062 or later; LJ71E71-100: serial number 24062 or later

  1. 1. Identify the specific Mitsubishi Electric device model (RD81MES96N, QJ71E71-100, or LJ71E71-100) in your environment.
  2. 2. For RD81MES96N: Check current firmware version - if version 08 or prior, plan upgrade to firmware version 09.
  3. 3. For QJ71E71-100: Check the first 5 digits of the serial number - if 24061 or prior, plan upgrade to serial number 24062 or later.
  4. 4. For LJ71E71-100: Check the first 5 digits of the serial number - if 24061 or prior, plan upgrade to serial number 24062 or later.
  5. 5. Obtain the firmware update from the official Mitsubishi Electric download support page (www.mitsubishielectric.com).
  6. 6. Follow Mitsubishi's official firmware update procedure for the specific device series.
  7. 7. After upgrade, verify the new firmware version/serial number matches the fixed release.
  8. 8. Test that the device functions normally after the update.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Melsec Iq R Rd81mes96n Firmware Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing12.0 h
  • Review / QA8.0 h
44.0 hours of engineering $7,720
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-25163 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data