CVE-2020-5594
Mitsubishi Electric MELSEC iQ-R, iQ-F, Q, L, and FX series CPU modules all versions contain a vulnerability that allows cleartext…
- Published
- Updated
- Reserved
- Assigned by
- jpcert
Description
Mitsubishi Electric MELSEC iQ-R, iQ-F, Q, L, and FX series CPU modules all versions contain a vulnerability that allows cleartext transmission of sensitive information between CPU modules and GX Works3 and/or GX Works2 via unspecified vectors.
Timeline
ID reserved
By jpcert
- 6 months later
· 6 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.3% · top 29% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Cleartext Transmission of Sensitive Information
- CWE-319 (opens in a new tab)All about CWE-319 and its CVEs
Affected products
Mitsubishi Electric Corporation · MELSEC iQ-R, iQ-F, Q, L, and FX series CPU modules
- affected all versions
References (3)
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-003_en.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-003.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://jvn.jp/en/vu/JVNVU91424496/index.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-5594)Record last updated .