Description
A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI programs of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.11 through 4.72, that could allow an authenticated attacker to access some restricted files on a vulnerable device.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zyxel | USG FLEX 100(W) firmware | 4.50 through 5.30 | — |
| Zyxel | USG FLEX 200 firmware | 4.50 through 5.30 | — |
| Zyxel | USG FLEX 500 firmware | 4.50 through 5.30 | — |
| Zyxel | USG FLEX 700 firmware | 4.50 through 5.30 | — |
| Zyxel | ATP series firmware | 4.32 through 5.30 | — |
| Zyxel | VPN series firmware | 4.30 through 5.30 | — |
| Zyxel | USG FLEX 50(W) firmware | 4.16 through 5.30 | — |
| Zyxel | USG 20(W)-VPN firmware | 4.16 through 5.30 | — |
| Zyxel | USG/ZyWALL series firmware | 4.11 through 4.72 | — |