Cleartext Transmission Vulnerability in Mitsubishi Electric MELSEC iQ-F Series
CVE-2025-7731

7.5HIGH

Key Information:

Vendor

Mitsubishi Electric Corporation

Status
Melsec Iq-f Series Fx5u-32mt/es
Melsec Iq-f Series Fx5u-32mt/ds
Melsec Iq-f Series Fx5u-32mt/ess
Melsec Iq-f Series Fx5u-32mt/dss
Vendor
CVE Published:
1 September 2025

What is CVE-2025-7731?

The vulnerability in the Mitsubishi Electric MELSEC iQ-F Series CPU module exposes sensitive information through cleartext transmission. This allows remote, unauthenticated attackers to intercept SLMP communication messages, potentially leading to credential exposure. With the obtained credentials, attackers can manipulate device values and disrupt program operations, posing significant risks to the integrity and availability of the affected systems.

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Affected Version(s)

MELSEC iQ-F Series FX5S-30MR/DS All versions

MELSEC iQ-F Series FX5S-30MR/ES All versions

MELSEC iQ-F Series FX5S-30MT/DS All versions

References

https://www.mitsubishielectric.com/psirt/vulnerability/pd...
vendor-advisory
https://jvn.jp/vu/JVNVU90041458/
government-resource
https://www.cisa.gov/news-events/ics-advisories/icsa-25-2...
government-resource

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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