CVE-2020-16850

HIGH
7.5
CVSS Score
Published: November 30, 2020 at 09:34 PM UTC
Updated: June 17, 2026 at 02:58 AM UTC
38 products affected across 1 vendorR08SFCPU FirmwareR120SFCPU FirmwareR32SFCPU Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network. This denial of service attack exposes Improper Input Validation. After halting, physical access to the PLC is required in order to restore production, and the device state is lost. This is related to R04CPU, RJ71GF11-T2, R04CPU, and RJ71GF11-T2.

Affected

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

v ≤ 20
mitsubishielectric-r00cpu (same device)
v ≤ 20
mitsubishielectric-r01cpu (same device)
v ≤ 20
mitsubishielectric-r02cpu (same device)
v ≤ 52
mitsubishielectric-r04cpu (same device)
v ≤ 52
mitsubishielectric-r08cpu (same device)
All versions
mitsubishielectric-r08pcpu (same device)
v ≤ 22
mitsubishielectric-r08sfcpu (same device)
v ≤ 52
mitsubishielectric-r120cpu (same device)
All versions
mitsubishielectric-r120pcpu (same device)
v ≤ 22
mitsubishielectric-r120sfcpu (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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-20CWE-400

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