description: A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI programs of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.11 through 4.72, that could allow an authenticated attacker to access some restricted files on a vulnerable device.
problem types: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
affected:
{
product: USG FLEX 100(W) firmware
vendor: Zyxel
versions:
status: affected, version: 4.50 through 5.30
}
{
product: USG FLEX 200 firmware
vendor: Zyxel
versions:
status: affected, version: 4.50 through 5.30
}
{
product: USG FLEX 500 firmware
vendor: Zyxel
versions:
status: affected, version: 4.50 through 5.30
}
{
product: USG FLEX 700 firmware
vendor: Zyxel
versions:
status: affected, version: 4.50 through 5.30
}
{
product: ATP series firmware
vendor: Zyxel
versions:
status: affected, version: 4.32 through 5.30
}
{
product: VPN series firmware
vendor: Zyxel
versions:
status: affected, version: 4.30 through 5.30
}
{
product: USG FLEX 50(W) firmware
vendor: Zyxel
versions:
status: affected, version: 4.16 through 5.30
}
{
product: USG 20(W)-VPN firmware
vendor: Zyxel
versions:
status: affected, version: 4.16 through 5.30
}
{
product: USG/ZyWALL series firmware
vendor: Zyxel
versions:
status: affected, version: 4.11 through 4.72
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
version: 3.1
]