🛡️ CVE-2023-34140
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-120 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-120
Public Exploit ✅ No
Source NVD
Published 2023-07-17
Updated 2026-06-08
Modified 2024-11-21
Fix URL N/A

Affected Packages

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

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