CVE-2023-22917

HIGH

Zyxel Usg Flex 100 Firmware < 5.32 - Buffer Overflow

Title source: rule

Description

A buffer overflow vulnerability in the “sdwan_iface_ipc” binary of Zyxel ATP series firmware versions 5.10 through 5.32, USG FLEX series firmware versions 5.00 through 5.32, USG FLEX 50(W) firmware versions 5.10 through 5.32, USG20(W)-VPN firmware versions 5.10 through 5.32, and VPN series firmware versions 5.00 through 5.35, which could allow a remote unauthenticated attacker to cause a core dump with a request error message on a vulnerable device by uploading a crafted configuration file.

References (1)

Core 1

Core References

Vendor Advisory

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

Scores

CVSS v3 7.5

EPSS 0.0056

EPSS Percentile 68.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-120

Status published

Products (18)

zyxel/atp100_firmware 5.10 - 5.32

zyxel/atp100w_firmware 5.10 - 5.32

zyxel/atp200_firmware 5.10 - 5.32

zyxel/atp500_firmware 5.10 - 5.32

zyxel/atp700_firmware 5.10 - 5.32

zyxel/atp800_firmware 5.10 - 5.32

zyxel/usg_20w-vpn_firmware 5.10 - 5.32

zyxel/usg_flex_100_firmware 5.00 - 5.32

zyxel/usg_flex_100w_firmware 5.00 - 5.32

zyxel/usg_flex_200_firmware 5.00 - 5.32

... and 8 more

Published Apr 24, 2023

Tracked Since Feb 18, 2026