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Fencer Vulns
high 7.5

CVE-2025-7731 json

Information Disclosure Vulnerability in MELSEC iQ-F Series CPU module

published 2025-09-01 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-26323

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-240-02 updated cvss 7.5

Mitsubishi Electric MELSEC iQ-F Series CPU Module

  • Mitsubishi Electric MELSEC iQ-F Series FX5S-30MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-30MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-30MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-30MT/DSS Mitsubishi Electric MELSEC iQ-F Series FX5S-30MT/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-30MT/ESS
    +34 more products
    Mitsubishi Electric MELSEC iQ-F Series FX5S-40MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-40MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-40MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-40MT/DSS Mitsubishi Electric MELSEC iQ-F Series FX5S-40MT/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-40MT/ESS Mitsubishi Electric MELSEC iQ-F Series FX5S-60MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-60MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-60MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-60MT/DSS Mitsubishi Electric MELSEC iQ-F Series FX5S-60MT/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-60MT/ESS Mitsubishi Electric MELSEC iQ-F Series FX5S-80MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-80MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-80MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5S-80MT/DSS Mitsubishi Electric MELSEC iQ-F Series FX5S-80MT/ES Mitsubishi Electric MELSEC iQ-F Series FX5S-80MT/ESS Mitsubishi Electric MELSEC iQ-F Series FX5U-32MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5U-32MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5U-32MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5U-32MT/DSS Mitsubishi Electric MELSEC iQ-F Series FX5U-32MT/ES Mitsubishi Electric MELSEC iQ-F Series FX5U-32MT/ESS Mitsubishi Electric MELSEC iQ-F Series FX5U-64MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5U-64MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5U-64MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5U-64MT/DSS Mitsubishi Electric MELSEC iQ-F Series FX5U-64MT/ES Mitsubishi Electric MELSEC iQ-F Series FX5U-64MT/ESS Mitsubishi Electric MELSEC iQ-F Series FX5U-80MR/DS Mitsubishi Electric MELSEC iQ-F Series FX5U-80MR/ES Mitsubishi Electric MELSEC iQ-F Series FX5U-80MT/DS Mitsubishi Electric MELSEC iQ-F Series FX5U-80MT/DSS
    affected: mitigation “Use a virtual private network (VPN) or similar to encrypt SLMP communication.” mitsubishielectric.com

35 more affected in the full advisory

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
14 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ESS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ESS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/D
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/D
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/D
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ESS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MR/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MR/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ESS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MR/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MR/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/DSS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MR/ES
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MR/DS
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MR/ES-A
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ES-A
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MR/ES-A
  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ES-A

Classification

Weakness
  • CWE-319 Cleartext Transmission of Sensitive Information

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.