CVE-2022-30525

Zyxel Multiple Firewalls OS Command Injection Vulnerability

Zyxel Multiple FirewallsNetwork & edge

CVSS

9.8Critical

ExploitationExploited in the wildAdded to KEV 16 May 2022CISA KEV

Exploit odds (EPSS)99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS

Fixed inNone listedNo source names a fixed version. Check the vendor advisory below

Federal deadline6 Jun 2022Remediation due date for US federal agenciesCISA KEV

CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

28 Apr 2022Exploit code publicMetasploit
12 May 2022, 13:05 UTCPublishedCVE List
16 May 2022Added to CISA KEVCISA KEV

Public exploit code and templates 3

Exploit moduleZyxel Firewall ZTP Unauthenticated Command Injection 28 Apr 2022Metasploit
Remote exploitZyxel USG FLEX 5.21 - OS Command Injection 3 Jun 2022Exploit-DB
Scanner templateZyxel Firewall - OS Command InjectionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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.

Text from CVE List

Affected versions 8

USG FLEX 100(W) firmwareaffected: 5.00 through 5.21 Patch 1CVE List
USG FLEX 200 firmwareaffected: 5.00 through 5.21 Patch 1CVE List
USG FLEX 500 firmwareaffected: 5.00 through 5.21 Patch 1CVE List
USG FLEX 700 firmwareaffected: 5.00 through 5.21 Patch 1CVE List
ATP series firmwareaffected: 5.10 through 5.21 Patch 1CVE List
VPN series firmwareaffected: 4.60 through 5.21 Patch 1CVE List
USG FLEX 50(W) firmwareaffected: 5.10 through 5.21 Patch 1CVE List
USG 20(W)-VPN firmwareaffected: 5.10 through 5.21 Patch 1CVE List