CVE-2022-30526

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

1.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-07-19 06:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:43 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.1% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-07-19 06:15 UTC

Last modified

2026-06-17 04:43 UTC

Exploit probability

1.1% · EPSS, next 30 days

Weakness

CWE-269 · Improper privilege management

Record status

Modified

Affected

• Zyxel Usg Flex 100w Firmware ≤ 5.30
• Zyxel Usg Flex 200 Firmware ≤ 5.30
• Zyxel Usg Flex 500 Firmware ≤ 5.30
• Zyxel Usg Flex 700 Firmware ≤ 5.30
• Zyxel Usg Flex 50w Firmware ≤ 5.30
• Zyxel usg20w-vpn Firmware ≤ 5.30
• Zyxel atp800 Firmware ≤ 5.30
• Zyxel atp700 Firmware ≤ 5.30

Attack profile CVSS 3.1 · 7.8

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-30526.md and follow it. Check whether this project is affected by CVE-2022-30526. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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