CVE-2022-26531

Multiple improper input validation flaws were identified in some CLI commands of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, VPN series firmware versions 4.30 through 5.21, NSG series firmware versions 1.00 through 1.33 Patch 4, NXC2500 firmware version 6.10(AAIG.3) and earlier versions, NAP203 firmware version 6.25(ABFA.7) and earlier versions, NWA50AX firmware version 6.25(ABYW.5) and earlier versions, WAC500 firmware version 6.30(ABVS.2) and earlier versions, and WAX510D firmware version 6.30(ABTF.2) and earlier versions, that could allow a local authenticated attacker to cause a buffer overflow or a system crash via a crafted payload.

Affected products

Zyxel Atp Series, Zyxel Nap203, Zyxel Nsg Series, Zyxel Nwa50Ax, Zyxel Nxc2500, Zyxel Usg Flex Series, Zyxel Usg/Zywall Series, Zyxel Vpn Series

Zyxel vpn100 Firmware

≤ 5.21

CVSS 3.1

7.8 HIGH

EPSS

5.7% (92th percentile)

Weakness

CWE-20

NVD status

Modified

Published

2022-05-24