CVE-2020-5527

HIGH
7.5
CVSS Score
Published: March 30, 2020 at 07:10 AM UTC
Updated: June 17, 2026 at 03:21 AM UTC
97 products affected across 1 vendorFX5UJ FirmwareFX5UC FirmwareR08CPU Firmware

Using MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series by Mitsubishi Electric Corporation?

Get instant alerts when new vulnerabilities affect MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series - before attackers find them.

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

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.

Affected

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

All versions
mitsubishielectric-cr800-q (same device)
All versions
mitsubishielectric-fx3g (same device)
All versions
mitsubishielectric-fx3gc (same device)
All versions
mitsubishielectric-fx3s (same device)
All versions
mitsubishielectric-fx3u (same device)
All versions
mitsubishielectric-fx3uc (same device)
All versions
mitsubishielectric-fx5u (same device)
All versions
mitsubishielectric-fx5uc (same device)
All versions
mitsubishielectric-fx5uj (same device)
All versions
mitsubishielectric-l02cpu (same device)

Remediation

No guide yet

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

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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