CVE-2022-40265

Denial of Service (DoS) Vulnerability in MELSEC iQ-R Series Ethernet Interface Module

HIGH
7.5
CVSS Score
Published: November 30, 2022 at 12:04 AM UTC
Updated: June 17, 2026 at 05:01 AM UTC
18 products affected across 1 vendorRJ71EN71 FirmwareR32ENCPU FirmwareR16ENCPU Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

Improper Input Validation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series RJ71EN71 Firmware version "65" and prior and Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120ENCPU Network Part Firmware version "65" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition by sending specially crafted packets. A system reset is required for recovery.

Affected

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

v ≤ 65
mitsubishielectric-r04encpu (same device)
v ≤ 65
mitsubishielectric-r08encpu (same device)
v ≤ 65
mitsubishielectric-r120encpu (same device)
v ≤ 65
mitsubishielectric-r16encpu (same device)
v ≤ 65
mitsubishielectric-r32encpu (same device)
v ≤ 65
mitsubishielectric-rj71en71 (same device)

Remediation

No guide yet

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

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-20

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