The default SNMP configuration on ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), has a Trusted Host value of 0.0.0.0, which allows remote attackers to send SNMP requests from any source IP address.
| Software | From | Fixed in |
|---|---|---|
| zyxel / zynos | 3.40-agd.2 | 3.40-agd.2.x |
| zyxel / zynos | 3.40-agl.3 | 3.40-agl.3.x |
| zyxel / zynos | 3.40-ahq.0 | 3.40-ahq.0.x |
| zyxel / zynos | 3.40-ahq.3 | 3.40-ahq.3.x |
| zyxel / zynos | 3.40-ahz.0 | 3.40-ahz.0.x |
| zyxel / zynos | 3.40-atm.0 | 3.40-atm.0.x |
| zyxel / prestige_661 | hw-d1 | hw-d1.x |
| zyxel / prestige_660 | h-d1 | h-d1.x |
| zyxel / prestige_660 | h-d3 | h-d3.x |