CVE-2022-30525

Name: CVE-2022-30525
Creator: NVD / NIST
Published: 2022-05-12T14:15:07.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.94%

Last modified Jun 17, 2026

CVE-2022-30525 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.94% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

99.94%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jun 6, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zyxel	Usg Flex 100w Firmware	>= 5.00, < 5.30
Zyxel	Usg Flex 200 Firmware	>= 5.00, < 5.30
Zyxel	Usg Flex 500 Firmware	>= 5.00, <= 5.30
Zyxel	Usg Flex 700 Firmware	>= 5.00, < 5.30
Zyxel	Vpn100 Firmware	>= 4.60, < 5.30
Zyxel	Vpn1000 Firmware	>= 4.60, < 5.30
Zyxel	Vpn300 Firmware	>= 4.60, < 5.30
Zyxel	Vpn50 Firmware	>= 4.60, < 5.30
Zyxel	Atp100 Firmware	>= 5.10, < 5.30
Zyxel	Atp100w Firmware	>= 5.10, < 5.30
Zyxel	Atp200 Firmware	>= 5.10, < 5.30
Zyxel	Atp500 Firmware	>= 5.10, < 5.30
Zyxel	Atp700 Firmware	>= 5.10, < 5.30
Zyxel	Atp800 Firmware	>= 5.10, < 5.30
Zyxel	Usg Flex 50w Firmware	>= 5.10, < 5.30
Zyxel	Usg20w-Vpn Firmware	>= 5.10, < 5.30

References

http://packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.htmlThird Party Advisory, VDB Entry
http://packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.htmlExploit, Third Party Advisory
https://www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtmlVendor Advisory
http://packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.htmlThird Party Advisory, VDB Entry
http://packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.htmlExploit, Third Party Advisory
https://www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtmlVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-30525US Government Resource

Timeline

Published: May 12, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-30525?

How severe is CVE-2022-30525?

CVE-2022-30525 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.94% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2022-30525?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-30525?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST