CVE-2024-29975Public exploit

Administrator-to-root escalation via unrestricted SUID executable

Published Jun 4, 2024 · Updated Aug 2, 2024

Improper privilege management in Zyxel NAS326 and NAS542 firmware allows local users with administrator privileges to execute commands as root. The SUID executer_su binary accepts any absolute executable path and invokes it with effective user and group ID zero rather than limiting execution to approved programs. Affected builds are before 5.21(AAZF.17)C0 for NAS326 and before 5.21(ABAG.14)C0 for NAS542; successful use grants root command execution on the appliance.

CVSS severity6.7
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Zyxel NAS326 and NAS542 firmware allows local users with administrator privileges to execute commands as root. The SUID executer_su binary accepts any absolute executable path and invokes it with effective user and group ID zero rather than limiting execution to approved programs. Affected builds are before 5.21(AAZF.17)C0 for NAS326 and before 5.21(ABAG.14)C0 for NAS542; successful use grants root command execution on the appliance.

The record

CVE
CVE-2024-29975
Published
Jun 4, 2024
Updated
Aug 2, 2024
Vendor
Zyxel Networks
Product
NAS542 Firmware
Classifications
CWE-269, T1548.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <5.21\(abag.14\)co
  2. Affected versionversion=< V5.21(ABAG.14)C0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Zyxel Networks · NAS542 Firmwareversion=0 <5.21\(abag.14\)co; version=< V5.21(ABAG.14)C0
Zyxel Networks · NAS326 Firmwareversion=0 <v5.21\(aazf.17\)co; version=< V5.21(AAZF.17)C0

Published CVSS scores

6.7Zyxel CorporationCVSS:3.1/AV:L/AC:L/PR:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1548.001Abuse Elevation Control Mechanism: Setuid and Setgid

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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