9.8

CVE-2023-28771

Warning
Exploit

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.

Data is provided by the National Vulnerability Database (NVD)
Zyxel ≫ Atp100 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Atp100 Version-
Zyxel ≫ Atp100w Firmware Version >= 4.60 < 5.35
   Zyxel ≫ Atp100w Version-
Zyxel ≫ Atp200 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Atp200 Version-
Zyxel ≫ Atp500 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Atp500 Version-
Zyxel ≫ Atp700 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Atp700 Version-
Zyxel ≫ Atp800 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Atp800 Version-
Zyxel ≫ Usg Flex 100 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 100 Version-
Zyxel ≫ Usg Flex 100w Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 100w Version-
Zyxel ≫ Usg Flex 200 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 200 Version-
Zyxel ≫ Usg Flex 50 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 50 Version-
Zyxel ≫ Usg Flex 500 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 500 Version-
Zyxel ≫ Usg Flex 50w Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 50w Version-
Zyxel ≫ Usg Flex 700 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Usg Flex 700 Version-
Zyxel ≫ Vpn100 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Vpn100 Version-
Zyxel ≫ Vpn1000 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Vpn1000 Version-
Zyxel ≫ Vpn300 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Vpn300 Version-
Zyxel ≫ Vpn50 Firmware Version >= 4.60 < 5.36
   Zyxel ≫ Vpn50 Version-
Zyxel ≫ Zywall Usg 310 Firmware Version >= 4.60 < 4.73
   Zyxel ≫ Zywall Usg 310 Version-
Zyxel ≫ Zywall Usg 310 Firmware Version4.73 Update-
   Zyxel ≫ Zywall Usg 310 Version-
Zyxel ≫ Zywall Usg 100 Firmware Version >= 4.60 < 4.73
   Zyxel ≫ Zywall Usg 100 Version-
Zyxel ≫ Zywall Usg 100 Firmware Version4.73 Update-
   Zyxel ≫ Zywall Usg 100 Version-

31.05.2023: CISA Known Exploited Vulnerabilities (KEV) Catalog

Zyxel Multiple Firewalls OS Command Injection Vulnerability

Vulnerability

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.

Description

Apply updates per vendor instructions.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 94.35% 0.999
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
security@zyxel.com.tw 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.