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CVE-2021-20599

Quick assessment

Affected
Mitsubishi Electric Corporation MELSEC iQ-R Series Safety CPU R08SFCPU
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 MELSEC iQ-R系列安全CPU R08/16/32/120SFCPU和MELSEC iQ-R系列SIL2进程CPU R08/16/32/120PSFCPU存在安全漏洞，攻击者可利用该漏洞获取密码以外的凭据登录到目标CPU模块。

CVSS 9.1 · Critical EPSS 1.40% · P70
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I. Basic Information for CVE-2021-20599

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Cleartext Transmission of Sensitive InformationCleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
Mitsubishi Electric MELSEC iQ-R series 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 MELSEC iQ-R系列安全CPU R08/16/32/120SFCPU和MELSEC iQ-R系列SIL2进程CPU R08/16/32/120PSFCPU存在安全漏洞，攻击者可利用该漏洞获取密码以外的凭据登录到目标CPU模块。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mitsubishi Electric Corporation MELSEC iQ-R Series Safety CPU R08SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R16SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R32SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R120SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU Firmware versions "11" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R16PSFCPU Firmware versions "11" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R32PSFCPU Firmware versions "11" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R120PSFCPU Firmware versions "11" and prior -

II. Public POCs for CVE-2021-20599

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III. Intelligence Information for CVE-2021-20599

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Vendor Advisories for CVE-2021-20599 (2)

Other References for CVE-2021-20599 (1)

IV. Related Vulnerabilities

Same product: MELSEC iQ-R Series Safety CPU R08SFCPU
Same vendor: Mitsubishi Electric Corporation
Same weakness: CWE-319

V. Comments for CVE-2021-20599

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