CVE-2023-22915

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.87% Top 30%
Vendor Advisory zyxel.com
Affected: Zyxel USG FLEX series firmware
Affected: Zyxel USG FLEX 50(W) firmware
Affected: Zyxel USG20(W)-VPN firmware
Affected: Zyxel VPN series firmware
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2023-22915?
CVE-2023-22915 has been scored as a high severity vulnerability.
How to fix CVE-2023-22915?
To fix CVE-2023-22915, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-22915 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-22915 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-22915?
CVE-2023-22915 affects Zyxel USG FLEX series firmware, Zyxel USG FLEX 50(W) firmware, Zyxel USG20(W)-VPN firmware, Zyxel VPN series firmware.
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