CVE-2022-30525: Zyxel Multiple Firewalls OS Command Injection Vulnerability

CVE-2022-30525 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-05-16

An OS command injection vulnerability in the CGI program of multiple Zyxel firewall series allows unauthenticated remote attackers to execute arbitrary OS commands by modifying specific files. The vulnerability affects USG FLEX, ATP, and VPN series devices running specific firmware versions.

Technologies: Zyxel Firewalls, Zyxel Multiple Firewalls. Vendors: Zyxel.

Quick answers

Is CVE-2022-30525 exploited in the wild?
Yes. CVE-2022-30525 is known to be exploited in the wild, first recorded on 16 May 2022. Treat it as urgent.
How severe is CVE-2022-30525?
Critical severity, with a CVSS score of 9.8, published 16 May 2022.
Which products and versions are affected?
Zyxel USG FLEX 100(W) firmware 5.00 through 5.21 Patch 1; Zyxel USG FLEX 200 firmware 5.00 through 5.21 Patch 1; Zyxel USG FLEX 500 firmware 5.00 through 5.21 Patch 1; Zyxel USG FLEX 700 firmware 5.00 through 5.21 Patch 1; and 4 more.
Is there a fix for CVE-2022-30525?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2022-30525 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2022-30525?
Check whether you run Zyxel Firewalls or Zyxel Multiple Firewalls. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Zyxel USG FLEX 100(W) firmware 5.00 through 5.21 Patch 1
  • Zyxel USG FLEX 200 firmware 5.00 through 5.21 Patch 1
  • Zyxel USG FLEX 500 firmware 5.00 through 5.21 Patch 1
  • Zyxel USG FLEX 700 firmware 5.00 through 5.21 Patch 1
  • Zyxel USG FLEX 50(W) firmware 5.10 through 5.21 Patch 1
  • Zyxel USG20(W)-VPN firmware 5.10 through 5.21 Patch 1
  • Zyxel ATP series firmware 5.10 through 5.21 Patch 1
  • Zyxel VPN series firmware 4.60 through 5.21 Patch 1

Timeline

  • 2022-05-12: disclosed: Initial discovery/reporting period based on advisory timing
  • 2022-05-16: advisory: Zyxel security advisory published
  • 2022-05-16: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-05-16: exploited: Confirmed exploited in the wild per CISA KEV entry

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