CVSS 3.1
6.5 mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2023-34140
Medium (6.5) in zyxel. EPSS 0.3% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
- CWE
- CWE-120
- Published
- Modified
- Record from
- the NVD, synced
Affected
- zyxel:nxc2500_firmware
- zyxel:nxc5500_firmware
- zyxel:usg_20w-vpn_firmware
- zyxel:usg_2200-vpn_firmware
- zyxel:usg_flex_100_firmware
- zyxel:usg_flex_100w_firmware
- zyxel:usg_flex_200_firmware
- zyxel:usg_flex_500_firmware
- zyxel:usg_flex_50_firmware
- zyxel:usg_flex_50w_firmware
- zyxel:usg_flex_700_firmware
- zyxel:zywall_atp100_firmware
- zyxel:zywall_atp100w_firmware
- zyxel:zywall_atp200_firmware
- zyxel:zywall_atp500_firmware
- zyxel:zywall_atp700_firmware
- zyxel:zywall_atp800_firmware
- zyxel:zywall_vpn100_firmware
- zyxel:zywall_vpn2s_firmware
- zyxel:zywall_vpn300_firmware
- zyxel:zywall_vpn50_firmware
- zyxel:zywall_vpn_100_firmware
- zyxel:zywall_vpn_300_firmware
- zyxel:zywall_vpn_50_firmware