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Case File

CVE-2020-29583

CRITICAL · CVSS 9.8 EPSS 90.05% CISA KEV · Actively Exploited

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-12-22 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CISA KEV Details

Status: This CVE is listed in CISA's Known Exploited Vulnerabilities catalog.

Ransomware use: Unknown

Added to KEV: 2021-11-03

Required action: Apply updates per vendor instructions.

CVE
CVE-2020-29583
Severity
CRITICAL
CVSS
9.8
EPSS
90.05%

Original NVD Description

Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. This account can be used by someone to login to the ssh server or web interface with admin privileges.