Format String Vulnerability in Zyxel ATP and USG FLEX Series Firmware
CVE-2023-33011

8.8HIGH

Key Information:

Vendor
Zyxel
Status
Atp Series Firmware
Usg Flex Series Firmware
Usg Flex 50(w) Series Firmware
Usg20(w)-vpn Series Firmware
Vendor
CVE Published:
17 July 2023

Summary

This vulnerability exists in the Zyxel ATP and USG FLEX series firmware, allowing an unauthenticated attacker within the local network to execute arbitrary operating system commands. By leveraging a specially crafted PPPoE configuration while the cloud management mode is active, attackers can exploit this flaw on the specified firmware versions, potentially compromising device integrity and network security.

Affected Version(s)

ATP series firmware 5.10 through 5.36 Patch 2

USG FLEX 50(W) series firmware 5.10 through 5.36 Patch 2

USG FLEX series firmware 5.00 through 5.36 Patch 2

References

https://www.zyxel.com/global/en/support/security-advisori...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.