Insufficiently protected credentials in Mitsubishi Electric products - CVE-2021-20597

Vulnerability identifier: #VU56390

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-20597

CWE-ID: CWE-522

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficiently protected credentials. A remote attacker can obtain unprotected credentials by sniffing network traffic.

MELSEC iQ-R 08 SFCPU
MELSEC iQ-R 16 SFCPU
MELSEC iQ-R 32 SFCPU
MELSEC iQ-R 120 SFCPU
MELSEC iQ-R 08 PSFCPU
MELSEC iQ-R 16 PSFCPU
MELSEC iQ-R 32 PSFCPU
MELSEC iQ-R 120 PSFCPU

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

• https://jvn.jp/vu/JVNVU98578731/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf

• Multiple vulnerability in Mitsubishi Electric MELSEC iQ-R Series