CVE-2025-8531

State: Published
Severity: 6.8 Medium
Published: Sep 19, 2025
Updated: Sep 24, 2025
Reserved: Aug 4, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H	Mitsubishi

Weaknesses

CWE-130 Improper Handling of Length Parameter Inconsistency

Affected Products

Product	Versions
MELSEC-Q Series Q03UDVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q04UDVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q06UDVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q13UDVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q26UDVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q04UDPVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q06UDPVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q13UDPVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected
MELSEC-Q Series Q26UDPVCPUMitsubishi Electric Corporation	The first 5 digits of serial No. "24082" to "27081"Affected

References

https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-013_en.pdfvendor-advisory
https://jvn.jp/vu/JVNVU97846038/government-resource
https://www.cisa.gov/news-events/ics-advisories/icsa-25-266-02government-resource

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.