🛡️ CVE-2023-22915
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-120 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A buffer overflow vulnerability in the “fbwifi_forward.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.30 through 5.35, USG20(W)-VPN firmware versions 4.30 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote unauthenticated attacker to cause DoS conditions by sending a crafted HTTP request if the Facebook WiFi function were enabled on an affected device.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-120
Public Exploit ✅ No
Source NVD
Published 2023-04-24
Updated 2026-06-08
Modified 2024-11-21
Fix URL N/A

Affected Packages

Software From version Fixed in
usg-20w-vpn-firmware 4.30 5.35
usg-flex-100-firmware 4.50 5.35
usg-flex-100w-firmware 4.50 5.35
usg-flex-200-firmware 4.50 5.35
usg-flex-50-firmware 4.50 5.35
usg-flex-500-firmware 4.50 5.35
usg-flex-50w-firmware 4.30 5.35
usg-flex-700-firmware 4.50 5.35
vpn100-firmware 4.50 5.35
vpn1000-firmware 4.50 5.35
vpn300-firmware 4.50 5.35
vpn50-firmware 4.50 5.35

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