CRITICAL🚩 CISA KEV⚡ EXPLOIT✓ PATCH🇵🇱 Wersja polska

CVE-2023-28771

CVSS 9.8v3.1pub. 2023-04-25upd. 2025-10-27

Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Zyxel Atp100

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Atp100 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Atp100w

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Atp100w Firmware

    OS
    Zyxel
    4.60 – 5.35 (bez)

  • Zyxel Atp200

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Atp200 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Atp500

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Atp500 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Atp700

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Atp700 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Atp800

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Atp800 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 100

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 100 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 100w

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 100w Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 200

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 200 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 50

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 500

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 500 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 50 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 50w

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 50w Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Usg Flex 700

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Usg Flex 700 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Vpn100

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Vpn1000

    HW
    Zyxel
    wszystkie wersje

  • Zyxel Vpn1000 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

  • Zyxel Vpn100 Firmware

    OS
    Zyxel
    4.60 – 5.36 (bez)

CISA KEV — detailsi

Vendori
Zyxel
Producti
Multiple Firewalls
Added to KEVi
May 31, 2023
Remediation deadline (US Federal)i
June 21, 2023(overdue)
Required action (CISA)i

Apply updates per vendor instructions.

CISA descriptioni

Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.

🔴
IMMEDIATE ACTION
Actively exploited in the wild (CISA KEV). Patch immediately.
⏰CISA DEADLINE: 21 czerwca 2023
Tags
Auth BypassVPNCommand Injection
CWE
References

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