AUGUST 4, 2026
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Case File

CVE-2021-20599

CRITICAL · CVSS 9.1 EPSS 1.30%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-14 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-20599
Severity
CRITICAL
CVSS
9.1
EPSS
1.30%

Original NVD 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.