CVE-2022-30526Public exploit

Root command execution via overbroad SUID helper

Published Jul 19, 2022 · Updated Aug 3, 2024

Local privilege escalation in affected Zyxel firewall firmware allows local users with shell access to execute OS commands as root. The zysudo.suid helper permits low-privileged users to invoke an overbroad command allowlist, including copying attacker-controlled files over root-owned paths. Existing shell access is required; overwriting /var/zyxel/crontab schedules attacker-supplied code as root and grants full appliance control.

CVSS severity7.8
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in affected Zyxel firewall firmware allows local users with shell access to execute OS commands as root. The zysudo.suid helper permits low-privileged users to invoke an overbroad command allowlist, including copying attacker-controlled files over root-owned paths. Existing shell access is required; overwriting /var/zyxel/crontab schedules attacker-supplied code as root and grants full appliance control.

The record

CVE
CVE-2022-30526
Published
Jul 19, 2022
Updated
Aug 3, 2024
Vendor
Zyxel Networks
Product
Zyxel ATP Series Firmware
Classifications
CWE-269, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.32 through 5.30

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zyxel Networks · Zyxel ATP Series Firmwareversion=4.32 through 5.30
Zyxel Networks · Zyxel USG FLEX 50(W) Firmwareversion=4.16 through 5.30
Zyxel Networks · Zyxel USG FLEX 100(W) Firmwareversion=4.50 through 5.30
Zyxel Networks · Zyxel USG/ZyWALL Series Firmwareversion=4.09 through 4.72
Zyxel Networks · Zyxel USG20(W)-VPN Series Firmwareversion=4.16 through 5.30
Zyxel Networks · Zyxel USG FLEX 500 Firmwareversion=4.50 through 5.30
Zyxel Networks · Zyxel VPN Series Firmwareversion=4.30 through 5.30
Zyxel Networks · Zyxel USG FLEX 200 Firmwareversion=4.50 through 5.30
Zyxel Networks · USG FLEX 700 Firmwareversion=4.50 through 5.30

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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