CVE: CVE-2020-29583
Summary
Zyxel has released a patch for the hardcoded credential vulnerability of firewalls and AP controllers recently reported by researchers from EYE Netherlands. Users are advised to install the applicable firmware updates for optimal protection.
What is the vulnerability?
A hardcoded credential vulnerability was identified in the “zyfwp” user account in some Zyxel firewalls and AP controllers. The account was designed to deliver automatic firmware updates to connected access points through FTP
What versions are vulnerable—and what should you do?
After a thorough investigation, we’ve identified the vulnerable products and are releasing firmware patches to address the issue, as shown in the table below. For optimal protection, we urge users to install the applicable updates. For those not listed, they are not affected. Contact your local Zyxel support team if you require further assistance.
| Affected product series | Patch available in |
|---|---|
| Firewalls | |
| ATP series running firmware ZLD V4.60 | ZLD V4.60 Patch1 in Dec. 2020 |
| USG series running firmware ZLD V4.60 | ZLD V4.60 Patch1 in Dec. 2020 |
| USG FLEX series running firmware ZLD V4.60 | ZLD V4.60 Patch1 in Dec. 2020 |
| VPN series running firmware ZLD V4.60 | ZLD V4.60 Patch1 in Dec. 2020 |
| AP controllers | |
| NXC2500 running firmware V6.00 through V6.10 | V6.10 Patch1 on Jan. 8, 2021 |
| NXC5500 running firmware V6.00 through V6.10 | V6.10 Patch1 on Jan. 8, 2021 |