Is CVE-2020-29583 actively exploited?

Yes. CVE-2020-29583 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2020-29583 be exploited remotely?

The attack vector of CVE-2020-29583 has not been classified yet.

What is the CVSS score of CVE-2020-29583?

CVE-2020-29583 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2020-29583

HIGHCISA KEVIN THE WILD

CVE-2020-29583

Published: November 3, 2021

EPSS:94.37%probability of exploitation in 30 daysPercentile:100.0th

Official Description

Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500 and NXC5500) contain a use of hard-coded credentials vulnerability in an undocumented account ("zyfwp") with an unchangeable password.

NVD Source

CISA KEV Advisory

Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability

Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500 and NXC5500) contain a use of hard-coded credentials vulnerability in an undocumented account ("zyfwp") with an unchangeable password.

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500, NXC5500) contain a hard-coded credentials vulnerability. An undocumented account, 'zyfwp', has an unchangeable password, providing a persistent backdoor. This is a high-severity issue with a very high exploitation likelihood (EPSS 0.94367) and is actively exploited.

This vulnerability is actively exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities Catalog. The flaw is remotely exploitable due to the presence of hard-coded credentials.

Recommended Action

Apply the latest firmware updates for Zyxel firewalls and AP Controllers to remove or disable the hard-coded account. Regularly review and audit user accounts and credentials on network devices.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-29583 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2020-29583 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.