CVE-2023-22915: Buffer Overflow
A buffer overflow vulnerability in the “fbwififorward.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.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID of this Zyxel USG FLEX series firmware vulnerability?
The vulnerability ID of this Zyxel USG FLEX series firmware vulnerability is CVE-2023-22915.
What is the severity of CVE-2023-22915?
CVE-2023-22915 has a severity rating of 7.5 (High).
Which software versions are affected by CVE-2023-22915?
CVE-2023-22915 affects 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.
How can I fix CVE-2023-22915?
To fix CVE-2023-22915, it is recommended to update to the latest firmware version provided by Zyxel.
Where can I find more information about this vulnerability?
You can find more information about CVE-2023-22915 on Zyxel's official website: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps