Description
The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Zyxel / NAS326 firmware< V5.21(AAZF.14)C0 – < V5.21(AAZF.14)C0
- Zyxel / NAS540 firmware< V5.21(AATB.11)C0 – < V5.21(AATB.11)C0
- Zyxel / NAS542 firmware< V5.21(ABAG.11)C0 – < V5.21(ABAG.11)C0