ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), have (1) user as their default password for the user account and (2) 1234 as their default password for the admin account, which makes it easier for remote attackers to obtain access.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Prestige_660 | Zyxel | h-d1 (including) | h-d1 (including) |
| Prestige_660 | Zyxel | h-d3 (including) | h-d3 (including) |
| Prestige_661 | Zyxel | hw-d1 (including) | hw-d1 (including) |
| Zynos | Zyxel | 3.40-agd.2 (including) | 3.40-agd.2 (including) |
| Zynos | Zyxel | 3.40-agl.3 (including) | 3.40-agl.3 (including) |
| Zynos | Zyxel | 3.40-ahq.0 (including) | 3.40-ahq.0 (including) |
| Zynos | Zyxel | 3.40-ahq.3 (including) | 3.40-ahq.3 (including) |
| Zynos | Zyxel | 3.40-ahz.0 (including) | 3.40-ahz.0 (including) |
| Zynos | Zyxel | 3.40-atm.0 (including) | 3.40-atm.0 (including) |