Description
A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.36 Patch 2, USG FLEX series firmware versions 4.50 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.16 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.16 through 5.36 Patch 2, VPN series firmware versions 4.30 through 5.36 Patch 2, NXC2500 firmware versions 6.10(AAIG.0) through 6.10(AAIG.3), and NXC5500 firmware versions 6.10(AAOS.0) through 6.10(AAOS.4), could allow an unauthenticated, LAN-based attacker to cause denial of service (DoS) conditions by sending a crafted request to the CAPWAP daemon.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zyxel | ATP series firmware | 4.32 through 5.36 Patch 2 | — |
| Zyxel | USG FLEX series firmware | 4.50 through 5.36 Patch 2 | — |
| Zyxel | USG FLEX 50(W) series firmware | 4.16 through 5.36 Patch 2 | — |
| Zyxel | USG20(W)-VPN series firmware | 4.16 through 5.36 Patch 2 | — |
| Zyxel | VPN series firmware | 4.30 through 5.36 Patch 2 | — |
| Zyxel | NXC2500 firmware | 6.10(AAIG.0) through 6.10(AAIG.3) | — |
| Zyxel | NXC5500 firmware | 6.10(AAOS.0) through 6.10(AAOS.4) | — |
Advisories 1
- WID-SEC-2023-1765 Zyxel Firewall: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 17, 2023