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CVE-2025-8531

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CVE-2025-8531

Published: Sep 19, 2025

Modified: Sep 24, 2025

PUBLISHED

CVSS v3.1

6.8

MEDIUM

Description

Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric Corporation MELSEC-Q Series Q03UDVCPU, Q04UDVCPU, Q06UDVCPU, Q13UDVCPU, Q26UDVCPU, Q04UDPVCPU, Q06UDPVCPU, Q13UDPVCPU, and Q26UDPVCPU with the first 5 digits of serial No. "24082" to "27081" allows a remote attacker to cause an integer underflow by sending specially crafted packets to the affected product to stop Ethernet communication and the execution of control programs on the product, when the user authentication function is enabled. The user authentication function is enabled by default only when settings are configured by GX Works2, which complies with the Cybersecurity Law of the People's Republic of China, and is normally disabled.

VendorProductVersions

Mitsubishi Electric Corporation

MELSEC-Q Series Q03UDVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q04UDVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q06UDVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q13UDVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q26UDVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q04UDPVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q06UDPVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q13UDPVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Mitsubishi Electric Corporation

MELSEC-Q Series Q26UDPVCPU

affected
The first 5 digits of serial No. "24082" to "27081"

Weaknesses (CWE)

CWE-130

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

References

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