CVE-2022-30525
Zyxel USG FLEX 100(W) firmware, Zyxel USG FLEX 200 firmware, Zyxel USG FLEX 500 firmware
Published 12 May 2022 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 16 May 2022, with a remediation deadline of 6 Jun 2022 for US federal agencies.
Required action: Apply updates per vendor instructions.
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.
References
- packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.html · Third Party Advisory, VDB Entry
- packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.html · Exploit, Third Party Advisory, VDB Entry
- packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.html · Exploit, Third Party Advisory, VDB Entry
- packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html · Exploit, Third Party Advisory
- www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtml · Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-30525 · US Government Resource