description: 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.
problem types: CWE-20: Improper Input Validation
affected:
{
vendor: Zyxel
product: USG/ZyWALL series firmware
versions:
version: 4.09 through 4.71, status: affected
}
{
vendor: Zyxel
product: USG FLEX series firmware
versions:
version: 4.50 through 5.21, status: affected
}
{
vendor: Zyxel
product: ATP series firmware
versions:
version: 4.32 through 5.21, status: affected
}
{
vendor: Zyxel
product: VPN series firmware
versions:
version: 4.30 through 5.21, status: affected
}
{
vendor: Zyxel
product: NSG series firmware
versions:
version: 1.00 through 1.33 Patch 4, status: affected
}
{
vendor: Zyxel
product: NXC2500 firmware
versions:
version: <= 6.10(AAIG.3), status: affected
}
{
vendor: Zyxel
product: NAP203 firmware
versions:
version: <= 6.25(ABFA.7), status: affected
}
{
vendor: Zyxel
product: NWA50AX firmware
versions:
version: <= 6.25(ABYW.5), status: affected
}
{
vendor: Zyxel
product: WAC500 firmware
versions:
version: <= 6.30(ABVS.2), status: affected
}
{
vendor: Zyxel
product: WAX510D firmware
versions:
version: <= 6.30(ABTF.2), status: affected
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: LOW
availabilityImpact: HIGH
baseScore: 6.1
baseSeverity: MEDIUM
]