Critical severity9.8CISA KEVNVD Advisory· Published May 12, 2022· Updated Jun 17, 2026
CVE-2022-30525
CVE-2022-30525
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
32- cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*Range: >=5.00,<5.30
- cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*Range: >=5.00,<=5.30
- Range: 5.00 - 5.21 Patch 1
- Range: 5.00 - 5.21 Patch 1
4.60 - 5.21 Patch 1+ 1 more
- (no CPE)range: 4.60 - 5.21 Patch 1
- (no CPE)range: 4.60 through 5.21 Patch 1
5.00 - 5.21 Patch 1+ 1 more
- (no CPE)range: 5.00 - 5.21 Patch 1
- (no CPE)range: 5.00 through 5.21 Patch 1
5.00 - 5.21 Patch 1+ 1 more
- (no CPE)range: 5.00 - 5.21 Patch 1
- (no CPE)range: 5.00 through 5.21 Patch 1
5.10 - 5.21 Patch 1+ 1 more
- (no CPE)range: 5.10 - 5.21 Patch 1
- (no CPE)range: 5.10 through 5.21 Patch 1
5.10 - 5.21 Patch 1+ 1 more
- (no CPE)range: 5.10 - 5.21 Patch 1
- (no CPE)range: 5.10 through 5.21 Patch 1
- Zyxel/USG 20(W)-VPN firmwarev5Range: 5.10 through 5.21 Patch 1
- Zyxel/USG FLEX 500 firmwarev5Range: 5.00 through 5.21 Patch 1
- Zyxel/USG FLEX 700 firmwarev5Range: 5.00 through 5.21 Patch 1
Patches
Vulnerability mechanics
References
6- packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.htmlnvdExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.htmlnvdExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.htmlnvdExploitThird Party Advisory
- packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.htmlnvdThird Party AdvisoryVDB Entry
- www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtmlnvdVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
1- TuxBot v3: Inside an IoT Botnet Framework With LLM-Assisted DevelopmentUnit 42 · Jul 15, 2026