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CVE-2020-5644

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-06 · updated 2026-06-17
• Weakness: CWE-120

Description

Buffer overflow vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series (GT1455-QTBDE CoreOS version "05.65.00.BD" and earlier, GT1450-QMBDE CoreOS version "05.65.00.BD" and earlier, GT1450-QLBDE CoreOS version "05.65.00.BD" and earlier, GT1455HS-QTBDE CoreOS version "05.65.00.BD" and earlier, and GT1450HS-QMBDE CoreOS version "05.65.00.BD" and earlier) allows a remote unauthenticated attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

Affected products

• Mitsubishielectric Coreos: through 05.65.00.bd

References

• https://jvn.jp/vu/JVNVU99562395/index.html
• https://us-cert.cisa.gov/ics/advisories/icsa-20-310-02
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-014.pdf
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-014_en.pdf
• https://jvn.jp/vu/JVNVU99562395/index.html
• https://us-cert.cisa.gov/ics/advisories/icsa-20-310-02
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-014.pdf
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-014_en.pdf

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