What is CVE-2023-4398?

CVE-2023-4398 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2023-11-28.

How severe is CVE-2023-4398?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Zyxel Atp Series Firmware

CVE-2023-4398

An integer overflow vulnerability in the source code of the QuickSec IPSec toolkit used in the VPN feature of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) ser…

Vulnerability class: Integer Overflow

EPSS: 0.002 (41.1th 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 Atp Series Firmware — versions versions 4.32 through 5.37
Zyxel Usg20(w)-vpn Series Firmware — versions versions 4.16 through 5.37
Zyxel Usg Flex 50(w) Series Firmware — versions versions 4.16 through 5.37
Zyxel Usg Flex Series Firmware — versions versions 4.50 through 5.37
Zyxel Vpn Series Firmware — versions versions 4.30 through 5.37

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory)

Frequently asked questions

What is CVE-2023-4398?: CVE-2023-4398 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2023-11-28.
How severe is CVE-2023-4398?: High severity. CVSS v3 base score is 7.5 out of 10.