CVE-2022-30526

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

A privilege escalation vulnerability was identified in the CLI command of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.09 through 4.72, which could allow a local attacker to execute some OS commands with root privileges in some directories on a vulnerable device.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-269

Affected software

Vendor	Product	Versions
Zyxel	USG FLEX 100(W) firmware	4.50 through 5.30
Zyxel	USG FLEX 200 firmware	4.50 through 5.30
Zyxel	USG FLEX 500 firmware	4.50 through 5.30
Zyxel	USG FLEX 700 firmware	4.50 through 5.30
Zyxel	ATP series firmware	4.32 through 5.30
Zyxel	VPN series firmware	4.30 through 5.30
Zyxel	USG FLEX 50(W) firmware	4.16 through 5.30
Zyxel	USG 20(W)-VPN firmware	4.16 through 5.30
Zyxel	USG/ZyWALL series firmware	4.09 through 4.72

References

http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-traversal-vulnerabilities-of-firewalls.shtmlVendor Advisory
http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-traversal-vulnerabilities-of-firewalls.shtmlVendor Advisory

Timeline

Published: Jul 19, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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