Description
A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on 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 5.36 Patch 1 – 4.60 through 5.36 Patch 1
- Zyxel / USG20(W)-VPN firmware4.60 through 5.36 Patch 1 – 4.60 through 5.36 Patch 1
- Zyxel / USG FLEX 50(W) firmware4.60 through 5.36 Patch 1 – 4.60 through 5.36 Patch 1
- Zyxel / USG FLEX series firmware4.60 through 5.36 Patch 1 – 4.60 through 5.36 Patch 1
- Zyxel / VPN series firmware4.60 through 5.36 Patch 1 – 4.60 through 5.36 Patch 1
- Zyxel / ZyWALL/USG series firmware4.60 through 4.73 Patch 1 – 4.60 through 4.73 Patch 1