high
8.8
CWE
134
Advisory Published
Updated

CVE-2023-33011

First published: Mon Jul 17 2023(Updated: )

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.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel USG2200-VPN Firmware>=5.00<5.37
Zyxel USG2200-VPN Firmware
Zyxel USG Flex 100 firmware>=5.00<5.37
Zyxel USG Flex 100 firmware
Zyxel USG FLEX 100w firmware>=5.00<5.37
Zyxel USG FLEX 100w firmware
Zyxel USG FLEX firmware>=5.00<5.37
Zyxel USG FLEX 200 firmware
Zyxel USG FLEX 50(W) series firmware>=5.00<5.37
Zyxel USG FLEX 50w
Zyxel USG FLEX firmware>=5.00<5.37
Zyxel USG FLEX 500 firmware
Zyxel USG FLEX 50w>=5.00<5.37
Zyxel USG FLEX 50(W) series firmware
Zyxel USG FLEX firmware>=5.00<5.37
Zyxel USG FLEX 700 firmware
Zyxel Zywall VPN 100>=5.00<5.37
Zyxel Zywall VPN 100
Zyxel Zywall VPN 2S>=5.00<5.37
Zyxel Zywall VPN 2S
Zyxel Zywall VPN 300 Firmware>=5.00<5.37
Zyxel Zywall VPN 300
Zyxel Zywall VPN 50 Firmware>=5.00<5.37
Zyxel Zywall VPN 50 Firmware
Zyxel Zywall VPN 100>=5.00<5.37
Zyxel VPN100
Zyxel Zywall VPN300>=5.00<5.37
Zyxel Zywall VPN300
Zyxel VPN50 Firmware>=5.00<5.37
Zyxel VPN50
Zyxel USG 20W-VPN Firmware>=5.10<5.37
Zyxel USG20
Zyxel Zywall ATP100W Firmware>=5.10<5.37
Zyxel ZyWall ATP100 Firmware
Zyxel ATP100W Firmware>=5.10<5.37
Zyxel Zywall ATP100W Firmware
Zyxel Zywall ATP200>=5.10<5.37
Zyxel Zywall ATP200
Zyxel ATP500 Firmware>=5.10<5.37
Zyxel ATP500 Firmware
Zyxel ATP700 Firmware>=5.10<5.37
Zyxel ATP700 Firmware
Zyxel ATP800>=5.10<5.37
Zyxel Zywall ATP800 Firmware

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-33011?

    CVE-2023-33011 is a format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2.

  • Which Zyxel firmware versions are affected by CVE-2023-33011?

    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.

  • What is the severity of CVE-2023-33011?

    CVE-2023-33011 has a severity rating of 8.8 (High).

  • How can I fix CVE-2023-33011?

    To fix CVE-2023-33011, update your Zyxel firmware to version 5.37 or higher.

  • Where can I find more information about CVE-2023-33011?

    More information about CVE-2023-33011 can be found in the Zyxel Security Advisory.

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