Zyxel ZYWALL1100 Firmware vulnerabilities

2 CVEs affecting Zyxel ZYWALL1100 Firmware, 2 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2020-29583, published 2020-12-22.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2020-9054: Zyxel Multiple NAS Devices OS Command Injection Vulnerability, published 2020-03-04. Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2022-03-25. EPSS: 100% chance of exploitation in the next 30 days. Multiple ZyXEL network-attached storage (NAS) devices running firmware version 5.21 contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to…
CVE-2020-29583: Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability, published 2020-12-22. Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 90.2% chance of exploitation in the next 30 days. 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…