Description
Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.
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 / ATP series firmware4.60 through 5.35 – 4.60 through 5.35
- Zyxel / USG FLEX series firmware4.60 through 5.35 – 4.60 through 5.35
- Zyxel / VPN series firmware4.60 through 5.35 – 4.60 through 5.35
- Zyxel / ZyWALL/USG series firmware4.60 through 4.73 – 4.60 through 4.73
Exploits & PoCs
- nucleiUnauthenticated ZyXEL USG ZTP - Detectby dmartyn