description: A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote authenticated attacker to modify device configuration data, resulting in denial-of-service (DoS) conditions on an affected device.
problem types: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
affected:
{
vendor: Zyxel
product: USG FLEX series firmware
versions:
version: 4.50 through 5.35, status: affected
}
{
vendor: Zyxel
product: VPN series firmware
versions:
version: 4.30 through 5.35, status: affected
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: HIGH
baseScore: 8.1
baseSeverity: HIGH
]