CVE-2021-20594

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to acquire legitimate user names registered in the module via brute-force attack on user names.

La exposición de información sensible a un actor no autorizado es una vulnerabilidad en los módulos de CPU de seguridad de la serie MELSEC iQ-R de Mitsubishi Electric R08/16/32/120SFCPU, versiones de firmware "26" y anteriores, y en los módulos de CPU de proceso SIL2 de la serie MELSEC iQ-R de Mitsubishi Electric R08/16/32/120PSFCPU, todas las versiones, que permite a un atacante remoto no autenticado adquirir nombres de usuario legítimos registrados en el módulo mediante un ataque de fuerza bruta a los nombres de usuario

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2021-08-06 CVE Published
2024-05-17 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (3)

URL	Tag	Source
https://jvn.jp/vu/JVNVU98578731/index.html	Third Party Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-250-01

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf	2024-05-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mitsubishielectric Search vendor "Mitsubishielectric"	R08sfcpu Firmware Search vendor "Mitsubishielectric" for product "R08sfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R08sfcpu Search vendor "Mitsubishielectric" for product "R08sfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R16sfcpu Firmware Search vendor "Mitsubishielectric" for product "R16sfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R16sfcpu Search vendor "Mitsubishielectric" for product "R16sfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R32sfcpu Firmware Search vendor "Mitsubishielectric" for product "R32sfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R32sfcpu Search vendor "Mitsubishielectric" for product "R32sfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R120sfcpu Firmware Search vendor "Mitsubishielectric" for product "R120sfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R120sfcpu Search vendor "Mitsubishielectric" for product "R120sfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R08psfcpu Firmware Search vendor "Mitsubishielectric" for product "R08psfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R08psfcpu Search vendor "Mitsubishielectric" for product "R08psfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R16psfcpu Firmware Search vendor "Mitsubishielectric" for product "R16psfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R16psfcpu Search vendor "Mitsubishielectric" for product "R16psfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R32psfcpu Firmware Search vendor "Mitsubishielectric" for product "R32psfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R32psfcpu Search vendor "Mitsubishielectric" for product "R32psfcpu"	-	-	Safe
Mitsubishielectric Search vendor "Mitsubishielectric"	R120psfcpu Firmware Search vendor "Mitsubishielectric" for product "R120psfcpu Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	R120psfcpu Search vendor "Mitsubishielectric" for product "R120psfcpu"	-	-	Safe