Skip to content
Noroxi
CVE-2025-7731· NVD / CVE Program· CNA Mitsubishi

Information Disclosure Vulnerability in MELSEC iQ-F Series CPU module

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.

HighCVSS 7.5 · v3.1—No exploit No fix recorded
Published
Sep 1, 2025
Updated
Jun 17, 2026
EPSS
0.3% · 24th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Mitsubishi
7.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Mitsubishi). Independent of NVD's CPE analysis and usually ahead of it.

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/DS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/ES

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/DS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/DSS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/ES

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MT/ESS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MR/DS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MR/ES

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/DS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/DSS

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/ES

    • All versionsaffected

  • Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-40MT/ESS

    • All versionsaffected

Same product

mitsubishi electric corporation: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-3755Information Disclosure and Denial-of-Service(DoS) Vulnerability in MELSEC iQ-F Series CPU module
    36Monitor
  • CVE-2025-7405Information Disclosure, Information Tampering, and Denial of Service (DoS) Vulnerability in MELSEC iQ-F Series CPU module
    29Monitor
  • CVE-2025-10259Denial-of-Service(DoS) Vulnerability in TCP Communication Function on MELSEC iQ-F Series CPU module
    21Monitor
  • CVE-2025-5514Denial-of-Service(DoS) Vulnerability in Web server function on MELSEC iQ-F Series CPU module
    21Monitor
  • CVE-2025-5241Denial-of-Service Vulnerability in MELSEC iQ-F Series
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-319 · Cleartext Transmission of Sensitive Information

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records