Critical severity9.8NVD Advisory· Published Mar 16, 2020· Updated Jun 17, 2026

CVE-2020-5543

Description

TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier does not properly manage sessions, which allows remote attackers to stop the network functions or execute malware via a specially crafted packet.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Mitsubishielectric/MELQIC IU1 series IU1-1M20-Dllm-create
Range: <=1.0.7
Mitsubishielectric/Mitsubishi Electric CNC M800V/M80V seriescpe-rescue
Range: IU1-1M20-D firmware version 1.0.7 and earlier

Patches

Vulnerability mechanics

References

www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2019-004.pdfnvdPatchVendor Advisory
jvn.jp/en/vu/JVNVU92370624/index.htmlnvdThird Party Advisory

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