What’s Vulnerable › Vulnerabilities

CVE-2025-7731: Information Disclosure Vulnerability in MELSEC iQ-F Series CPU module

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-01 · updated 2026-06-17
• Weakness: CWE-319

Description

Cleartext Transmission of Sensitive Information vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module allows a remote unauthenticated attacker to obtain credential information by intercepting SLMP communication messages, and read or write the device values of the product and stop the operations of programs by using the obtained credential information.

Affected products

• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/DSS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/ESS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MR/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MR/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/DSS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/ESS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-60MR/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-60MR/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-60MT/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-60MT/DSS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-60MT/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-60MT/ESS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-80MR/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-80MR/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-80MT/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-80MT/DSS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-80MT/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-80MT/ESS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES: all versions
• Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS: all versions

References

• https://jvn.jp/vu/JVNVU90041458/
• https://www.cisa.gov/news-events/ics-advisories/icsa-25-240-02
• https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-012_en.pdf

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