Buffer overflow in Zyxel Usg20(w)-vpn Firmware
CVE-2023-22915
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…
Vulnerability class: Buffer Overflow
EPSS: 0.007 (72.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Zyxel Usg20(w)-vpn Firmware — versions 4.30 through 5.35
- Zyxel Usg Flex 50(w) Firmware — versions 4.30 through 5.35
- Zyxel Usg Flex Series Firmware — versions 4.50 through 5.35
- Zyxel Vpn Series Firmware — versions 4.30 through 5.35
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2023-22915?
- CVE-2023-22915 is a high-severity vulnerability in Zyxel Usg20(w)-vpn Firmware, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-04-24.
- How severe is CVE-2023-22915?
- High severity. CVSS v3 base score is 7.5 out of 10.