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Findings

CVE-2022-30525

Zyxel Multiple Firewalls OS Command Injection Vulnerability

Published May 12, 2022 · updated Jun 16, 2026 · zyxel usg flex 100w firmware

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.

Timeline

Detection, updates, and resolution for this record.

  1. May 12, 2022 · Catalog

    Detected

    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 thro

  2. May 16, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Jun 6, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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 thro

Required action

Apply updates per vendor instructions.

CISA due date Jun 6, 2022

Affected

  • cpe zyxel/atp100 firmwareversion unspecified
  • cpe zyxel/atp100w firmwareversion unspecified
  • cpe zyxel/atp200 firmwareversion unspecified
  • cpe zyxel/atp500 firmwareversion unspecified
  • cpe zyxel/usg flex 100w firmwareversion unspecified
  • cpe zyxel/usg flex 200 firmwareversion unspecified
  • cpe zyxel/usg flex 500 firmwareversion unspecified
  • cpe zyxel/usg flex 700 firmwareversion unspecified
  • cpe zyxel/vpn100 firmwareversion unspecified
  • cpe zyxel/vpn1000 firmwareversion unspecified
  • cpe zyxel/vpn300 firmwareversion unspecified
  • cpe zyxel/vpn50 firmwareversion unspecified
  • vendor Zyxel Multiple Firewallsversion unspecified

Sources

  • CISA KEVCVE-2022-30525

    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.

    cisa.gov
  • CVE.orgCVE-2022-30525

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2022-30525

    30-day exploitation probability 99.9%

    first.org
  • Exploit Database50946

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit Modulesexploit_linux/http/zyxel_ztp_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDCVE-2022-30525

    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 th

    nvd.nist.gov
  • Packet Storm Securityhttp://packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • Packet Storm Securityhttp://packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • Packet Storm Securityhttp://packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • Packet Storm Securityhttp://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References