CVEvulnerability

CVE-2022-30525

9.8 CRITICAL Known exploited Published 2022-05-12 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Zyxel Multiple Firewalls OS Command Injection Vulnerability — Zyxel Multiple Firewalls

A command injection vulnerability in the CGI program of some Zyxel firewall versions could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.

Added to KEV: 2022-05-16
Remediation due: 2022-06-06
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2022-30525

Status: Analyzed
Published: 2022-05-12
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 10.0 HIGH — AV:N/AC:L/Au:N/C:C/I:C/A:C
Weaknesses: CWE-78

Description

A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.

Affected configurations

• zyxel usg flex 100w firmware (>= 5.00 < 5.30) • zyxel usg flex 200 firmware (>= 5.00 < 5.30) • zyxel usg flex 500 firmware (>= 5.00 <= 5.30) • zyxel usg flex 700 firmware (>= 5.00 < 5.30) • zyxel vpn100 firmware (>= 4.60 < 5.30) • zyxel vpn1000 firmware (>= 4.60 < 5.30) • zyxel vpn300 firmware (>= 4.60 < 5.30) • zyxel vpn50 firmware (>= 4.60 < 5.30) • zyxel atp100 firmware (>= 5.10 < 5.30) • zyxel atp100w firmware (>= 5.10 < 5.30) • zyxel atp200 firmware (>= 5.10 < 5.30) • zyxel atp500 firmware (>= 5.10 < 5.30) • zyxel atp700 firmware (>= 5.10 < 5.30) • zyxel atp800 firmware (>= 5.10 < 5.30) • zyxel usg flex 50w firmware (>= 5.10 < 5.30) • zyxel usg20w-vpn firmware (>= 5.10 < 5.30)

Weakness · CWE (1)

CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness

References