CVE-2023-22915

State: Published
Severity: 7.5 High
Published: Apr 24, 2023
Updated: Feb 12, 2025
Reserved: Jan 10, 2023

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Zyxel

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
USG FLEX series firmwareZyxel	4.50 through 5.35Affected
USG FLEX 50(W) firmwareZyxel	4.30 through 5.35Affected
USG20(W)-VPN firmwareZyxel	4.30 through 5.35Affected
VPN series firmwareZyxel	4.30 through 5.35Affected

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps

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