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High severity8.8NVD Advisory· Published Jul 17, 2023· Updated Jun 17, 2026

CVE-2023-33011

CVE-2023-33011

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

31
  • Zyxel/Usg20w VPN Firmware
    cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/Usg2200 VPN Firmware
    cpe:2.3:o:zyxel:usg_2200-vpn_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 100 Firmware
    cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 100w Firmware
    cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 200 Firmware
    cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 50 Firmware
    cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 500 Firmware
    cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 50w Firmware
    cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Usg Flex 700 Firmware
    cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Zywall Vpn100 Firmware2 versions
    cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:*range: >=5.00,<5.37
    • cpe:2.3:o:zyxel:zywall_vpn_100_firmware:*:*:*:*:*:*:*:*range: >=5.00,<5.37
  • Zyxel/Zywall Vpn2s Firmware
    cpe:2.3:o:zyxel:zywall_vpn2s_firmware:*:*:*:*:*:*:*:*
    Range: >=5.00,<5.37
  • Zyxel/Zywall Vpn300 Firmware2 versions
    cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:*range: >=5.00,<5.37
    • cpe:2.3:o:zyxel:zywall_vpn_300_firmware:*:*:*:*:*:*:*:*range: >=5.00,<5.37
  • Zyxel/Zywall Vpn50 Firmware2 versions
    cpe:2.3:o:zyxel:zywall_vpn50_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:zyxel:zywall_vpn50_firmware:*:*:*:*:*:*:*:*range: >=5.00,<5.37
    • cpe:2.3:o:zyxel:zywall_vpn_50_firmware:*:*:*:*:*:*:*:*range: >=5.00,<5.37
  • Zyxel/Zywall Atp100 Firmware
    cpe:2.3:o:zyxel:zywall_atp100_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/Zywall Atp100w Firmware
    cpe:2.3:o:zyxel:zywall_atp100w_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/Zywall Atp200 Firmware
    cpe:2.3:o:zyxel:zywall_atp200_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/Zywall Atp500 Firmware
    cpe:2.3:o:zyxel:zywall_atp500_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/Zywall Atp700 Firmware
    cpe:2.3:o:zyxel:zywall_atp700_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/Zywall Atp800 Firmware
    cpe:2.3:o:zyxel:zywall_atp800_firmware:*:*:*:*:*:*:*:*
    Range: >=5.10,<5.37
  • Zyxel/ATP seriesllm-fuzzy2 versions
    5.10 - 5.36 Patch 2+ 1 more
    • (no CPE)range: 5.10 - 5.36 Patch 2
    • (no CPE)range: 5.10 through 5.36 Patch 2
  • Zyxel/VPN seriesllm-fuzzy2 versions
    5.00 - 5.36 Patch 2+ 1 more
    • (no CPE)range: 5.00 - 5.36 Patch 2
    • (no CPE)range: 5.00 through 5.36 Patch 2
  • Zyxel/USG FLEX seriescpe-rescue3 versions
    5.00 through 5.36 Patch 2+ 2 more
    • (no CPE)range: 5.00 through 5.36 Patch 2
    • (no CPE)range: 5.10 through 5.36 Patch 2
    • (no CPE)range: 5.00 - 5.36 Patch 2
  • Zyxel/USG20(W)-VPN seriescpe-rescue2 versions
    5.10 through 5.36 Patch 2+ 1 more
    • (no CPE)range: 5.10 through 5.36 Patch 2
    • (no CPE)range: 5.10 - 5.36 Patch 2

Patches

Vulnerability mechanics

References

1

News mentions

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