CVE-2023-34140

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.

• zyxel usg 20w-vpn firmware (>= 4.16 < 5.37) • zyxel usg 2200-vpn firmware (>= 4.30 < 5.37) • zyxel usg flex 100 firmware (>= 4.50 < 5.37) • zyxel usg flex 100w firmware (>= 4.50 < 5.37) • zyxel usg flex 200 firmware (>= 4.50 < 5.37) • zyxel usg flex 50 firmware (>= 4.50 < 5.37) • zyxel usg flex 500 firmware (>= 4.50 < 5.37) • zyxel usg flex 50w firmware (>= 4.50 < 5.37) • zyxel usg flex 700 firmware (>= 4.50 < 5.37) • zyxel zywall atp100 firmware (>= 4.32 < 5.37) • zyxel zywall atp100w firmware (>= 4.32 < 5.37) • zyxel zywall atp200 firmware (>= 4.32 < 5.37) • zyxel zywall atp500 firmware (>= 4.32 < 5.37) • zyxel zywall atp700 firmware (>= 4.32 < 5.37) • zyxel zywall atp800 firmware (>= 4.32 < 5.37) • zyxel zywall vpn100 firmware (>= 4.30 < 5.37) • zyxel zywall vpn2s firmware (>= 4.30 < 5.37) • zyxel zywall vpn300 firmware (>= 4.30 < 5.37) • zyxel zywall vpn50 firmware (>= 4.30 < 5.37) • zyxel zywall vpn 100 firmware (>= 4.30 < 5.37) • zyxel zywall vpn 300 firmware (>= 4.30 < 5.37) • zyxel zywall vpn 50 firmware (>= 4.30 < 5.37) • zyxel nxc2500 firmware (>= 6.10\(aaig.0\) <= 6.10\(aaig.3\)) • zyxel nxc5500 firmware (>= 6.10\(aaos.0\) <= 6.10\(aaos.4\))