What is the CVSS score of CVE-2021-20598?

CVE-2021-20598 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 1.5%.

R08Sfcpu Firmware CVE-2021-20598

MEDIUM

Improper Authentication (CWE-287)

2021-08-06 Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp

Authentication Bypass R08Sfcpu Firmware R16Sfcpu Firmware R32Sfcpu Firmware R120Sfcpu Firmware R08Psfcpu Firmware R16Psfcpu Firmware R32Psfcpu Firmware R120Psfcpu Firmware

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

CVE Published

Aug 06, 2021 - 17:15 nvd

MEDIUM 5.3

DescriptionNVD

Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to lockout a legitimate user by continuously trying login with incorrect password.

AnalysisAI

Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Improper Authentication (CWE-287), which allows attackers to bypass authentication mechanisms to gain unauthorized access. Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to lockout a legitimate user by continuously trying login with incorrect password. Affected products include: Mitsubishielectric R08Sfcpu Firmware, Mitsubishielectric R16Sfcpu Firmware, Mitsubishielectric R32Sfcpu Firmware, Mitsubishielectric R120Sfcpu Firmware, Mitsubishielectric R08Psfcpu Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement multi-factor authentication, enforce strong password policies, use proven authentication frameworks.