Description
A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 5.10 through 5.36 Patch 2, and VPN series firmware versions 5.00 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands by using a crafted PPPoE configuration on an affected device when the cloud management mode is enabled.
CVSS breakdown
CVSS 3.1
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Zyxel / ATP series firmware5.10 through 5.36 Patch 2 – 5.10 through 5.36 Patch 2
- Zyxel / USG20(W)-VPN series firmware5.10 through 5.36 Patch 2 – 5.10 through 5.36 Patch 2
- Zyxel / USG FLEX 50(W) series firmware5.10 through 5.36 Patch 2 – 5.10 through 5.36 Patch 2
- Zyxel / USG FLEX series firmware5.00 through 5.36 Patch 2 – 5.00 through 5.36 Patch 2
- Zyxel / VPN series firmware5.00 through 5.36 Patch 2 – 5.00 through 5.36 Patch 2