Vulnerability in Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mr/ds
CVE-2025-3755
Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU modules allows a remote unauthenticated attacker to read information in the product, to cause a Denial-of-Service (DoS) condition in MELSOFT connection, or to stop the operation of the CPU module (causing a DoS condtion on the CPU module), by sending specially crafted packets. The product is needed to reset for recovery.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mr/ds — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mr/es — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mt/ds — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mt/dss — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mt/es — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mt/ess — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-40mr/ds — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-40mr/es — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-40mt/ds — versions All versions
- Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-40mt/dss — versions All versions
Weakness classification (CWE)
References
- www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-003_en.pdf (vendor-advisory)
- jvn.jp/vu/JVNVU94070048/ (government-resource)
- www.cisa.gov/news-events/ics-advisories/icsa-25-153-03 (government-resource)
Frequently asked questions
- What is CVE-2025-3755?
- CVE-2025-3755 is a critical-severity vulnerability in Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mr/ds, classified under CWE-1285. CVSS score: 9.1/10. Published 2025-05-29.
- How severe is CVE-2025-3755?
- Critical severity. CVSS v3 base score is 9.1 out of 10.