What’s Vulnerable › Vulnerabilities

CVE-2020-5542

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-16 · updated 2026-06-17
• Weakness: CWE-119

Description

Buffer error vulnerability in TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier allows remote attackers to stop the network functions or execute malware via a specially crafted packet.

Affected products

• Mitsubishi Electric Corporation Mitsubishi Electric MELQIC IU1 series: through 1.0.7

References

• https://jvn.jp/en/vu/JVNVU92370624/index.html
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2019-004.pdf
• https://jvn.jp/en/vu/JVNVU92370624/index.html
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2019-004.pdf

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