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Vulnerabilities

Vulnerability · CVE-2022-30525

Zyxel Multiple Firewalls OS Command Injection Vulnerability

Published May 12, 2022 · catalog updated Jun 16, 2026 · Zyxel Multiple Firewalls

Patch now

CVE-2022-30525 is in the CISA known-exploited catalog, due Jun 6, 2022. Confirm Zyxel Multiple Firewalls against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.94%
Remediation
Remediation guidance
Affected products
cpe zyxel/atp100 firmware · cpe zyxel/atp100w firmware · cpe zyxel/atp200 firmware · cpe zyxel/atp500 firmware · cpe zyxel/usg flex 100w firmware · cpe zyxel/usg flex 200 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • 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

How to fix CVE-2022-30525

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2022-30525 is in the CISA known-exploited catalog, due Jun 6, 2022. Confirm Zyxel Multiple Firewalls against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 99.94%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

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

Sources

  • CISA KEVConfirmed exploitationCVE-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.orgVulnerability recordCVE-2022-30525

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-30525

    30-day exploitation probability 99.9%

    first.org
  • Exploit DatabasePublic exploit reference50946

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

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_linux/http/zyxel_ztp_rce

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

    rapid7.com
  • NIST NVDVulnerability recordCVE-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 SecurityCited referencehttp://packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.html

    Packet Storm link already published on the finding.

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

    Packet Storm link already published on the finding.

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

    Packet Storm link already published on the finding.

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

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.