description: The post-authentication command injection vulnerability in Zyxel NAS326 firmware versions through V5.21(AAZF.15)C0 and NAS542 firmware versions through V5.21(ABAG.12)C0 could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands by sending a crafted query parameter attached to the URL of an affected device’s web management interface.
problem types: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
affected:
{
defaultStatus: unaffected
product: NAS326 firmware
vendor: Zyxel
versions:
status: affected, version: <= V5.21(AAZF.15)C0
}
{
defaultStatus: unaffected
product: NAS542 firmware
vendor: Zyxel
versions:
status: affected, version: <= V5.21(ABAG.12)C0
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.2
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: HIGH
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL