High severity7.5NVD Advisory· Published Mar 30, 2020· Updated Jun 17, 2026
CVE-2020-5527
CVE-2020-5527
Description
When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
50- cpe:2.3:o:mitsubishielectric:cr800-q_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx3g_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx3gc_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx3s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx3u_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx3uc_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx5u_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx5uc_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:fx5uj_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l02cpu-p_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l02cpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:l02scpu-p_firmware:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:mitsubishielectric:l02scpu-p_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l02scpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:l06cpu-p_firmware:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:mitsubishielectric:l06cpu-p_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l06cpu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:l26cpu-bt_firmware:-:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:mitsubishielectric:l26cpu-bt_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l26cpu-p_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l26cpu-pbt_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:l26cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q02phcpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q06phcpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q12dccpu-v_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q12phcpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q12prhcpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q172dscpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q173dscpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q173nccpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q24dhccpu-ls_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q24dhccpu-v_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q24dhccpu-vg2_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q25phcpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q25prhcpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:q26dhccpu-ls_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r00cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r01cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r02cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r04cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r04encpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r08cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r08encpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r120cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r120encpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r16cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r16encpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r32cpu_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishielectric:r32encpu_firmware:-:*:*:*:*:*:*:*
- Range: all versions
- Range: all versions
- Range: all versions
- Mitsubishi Electric Corporation/MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC seriesv5Range: MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions)
Patches
Vulnerability mechanics
References
2- jvn.jp/en/vu/JVNVU91553662/index.htmlnvdThird Party Advisory
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2019-005_en.pdfnvdVendor Advisory
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