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Vulnerability Assessment

Weakness
CWE
CWE-667
ASVS 5.0
V15 - Secure Coding and Architecture Proper locking
Impact

CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.44%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAI

Improper Resource Locking vulnerability in Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V firmware versions "16" and prior, Mitsubishi Electric MELSEC-Q Series Q03UDECPU the first 5 digits of. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-667. Improper Resource Locking vulnerability in Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V firmware versions "16" and prior, Mitsubishi Electric MELSEC-Q Series Q03UDECPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/10/13/20/26/50/100UDEHCPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/13/26UDPVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V all versions, Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G) all versions, Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS all versions, Mitsubishi Electric MELSEC-L series L02/06/26CPU(-P) the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-L series L26CPU-(P)BT the first 5 digits of serial number "24051" and prior and Mitsubishi Electric MELIPC Series MI5122-VW firmware versions "05" and prior allows a remote unauthenticated attacker to cause a denial of service (DoS) condition in Ethernet communications by sending specially crafted packets. A system reset of the products is required for recovery. Affected products include: Mitsubishielectric Q03Udecpu Firmware, Mitsubishielectric Q04Udehcpu Firmware, Mitsubishielectric Q04Udpvcpu Firmware, Mitsubishielectric Q04Udvcpu Firmware, Mitsubishielectric Q100Udehcpu Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

DescriptionCVE.org

Improper Resource Locking vulnerability in Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V firmware versions "16" and prior, Mitsubishi Electric MELSEC-Q Series Q03UDECPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/10/13/20/26/50/100UDEHCPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/13/26UDPVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V all versions, Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G) all versions, Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS all versions, Mitsubishi Electric MELSEC-L series L02/06/26CPU(-P) the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-L series L26CPU-(P)BT the first 5 digits of serial number "24051" and prior and Mitsubishi Electric MELIPC Series MI5122-VW firmware versions "05" and prior allows a remote unauthenticated attacker to cause a denial of service (DoS) condition in Ethernet communications by sending specially crafted packets. A system reset of the products is required for recovery.

Threat Intelligence Overview

EPSS Score
0.4%
Top 36% exploitable
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:mitsubishielectric:q03udecpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q04udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q04udpvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q04udvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q100udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q50udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q26dhccpu-ls_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q26udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q26udpvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q26udvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q20udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q13udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q13udpvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q13udvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q10udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q06ccpu-v_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q06phcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q06udehcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q06udpvcpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:q06udvcpu_firmware:-:*:*:*:*:*:*:*
+ 12 more

More in Q03Udecpu Firmware

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CVE-2020-16226 CRITICAL
9.8 Oct 05

Multiple Mitsubishi Electric products are vulnerable to impersonations of a legitimate device by a malicious actor, whic
CVE-2019-6535 HIGH
7.5 Feb 05

Mitsubishi Electric Q03/04/06/13/26UDVCPU: serial number 20081 and prior, Q04/06/13/26UDPVCPU: serial number 20081 and p
CVE-2019-13555 MEDIUM
5.9 Nov 13

In Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU: serial number 21081 and prior, Q04/06/13/26UDPVCPU: serial

Same weakness CWE-667 – Improper Locking

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CVE-2025-43510 HIGH POC
7.8
CVE-2019-5886 CRITICAL POC
9.8
CVE-2020-13246 HIGH POC
7.5
CVE-2019-15513 HIGH POC
7.5
CVE-2019-11599 HIGH POC
7.0
CVE-2023-21400 MEDIUM POC
6.7
CVE-2021-20291 MEDIUM POC
6.5
CVE-2026-53049 CRITICAL
9.8

Same technique Denial Of Service

View all
CVE-2015-5119 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2011-0611 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2011-0609 HIGH POC
7.8

References

Advisories & patches
ADVISORY https://vuldb.com/vuln/202194 ADVISORY https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-007_en.pdf REF https://jvn.jp/vu/JVNVU90895626/index.html REF https://www.cisa.gov/uscert/ics/advisories/icsa-22-172-01

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