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Critical · 9.8 Known exploited Scanner template Public exploit CVE-2022-30525 EUVD-2022-52385GHSA-987m-9prq-3p7m

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 …

Published May 12, 2022 · Updated Oct 21, 2025 · Assigned by Zyxel

Vendor: Zyxel Product: ATP series firmware Product: USG 20(W)-VPN firmware Product: USG FLEX 100(W) firmware Product: USG FLEX 200 firmware Product: USG FLEX 50(W) firmware Product: USG FLEX 500 firmware Product: USG FLEX 700 firmware Product: VPN series Firmware Category: Network devices

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 products

VendorProductAffectedFixed
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 ATP series firmware 5.10 through 5.21 Patch 1 —
Zyxel VPN series firmware 4.60 through 5.21 Patch 1 —
Zyxel USG FLEX 50(W) firmware 5.10 through 5.21 Patch 1 —
Zyxel USG 20(W)-VPN firmware 5.10 through 5.21 Patch 1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

Exploit-DB 1

GitHub 14 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

References