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CVE-2020-5545

CRITICAL
9.8
CVSS Score
Published: March 16, 2020 at 01:25 AM UTC
Updated: June 17, 2026 at 03:21 AM UTC
2 products affected across 1 vendorIu1-1m20 D FirmwareIu1-1M20-D

Using Mitsubishi Electric MELQIC IU1 series by Mitsubishi Electric Corporation?

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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%

Description

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 bypass access restriction and to stop the network functions or execute malware via a specially crafted packet.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Iu1-1m20 D Firmware· Mitsubishi Electric
95%
v ≤ 1.0.7
mitsubishielectric-iu1-1m20-d (same device)
Iu1-1M20-D· Mitsubishi Electricdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://jvn.jp/en/vu/JVNVU92370624/index.html
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2019-004.pdf

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-Other

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