CVE-2023-5797

Administrator-log disclosure via debug CLI privilege failure

Published Nov 28, 2023 · Updated Dec 2, 2024

Improper privilege management in Zyxel firewall and AP firmware allows local users to read administrator logs through the debug CLI. The debug CLI command fails to enforce the privilege boundary between authenticated local accounts and administrator-only log data. Exploitation requires an authenticated local account on an affected appliance and exposes log confidentiality without reported modification or service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
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 firewall and AP firmware allows local users to read administrator logs through the debug CLI. The debug CLI command fails to enforce the privilege boundary between authenticated local accounts and administrator-only log data. Exploitation requires an authenticated local account on an affected appliance and exposes log confidentiality without reported modification or service interruption.

The record

CVE
CVE-2023-5797
Published
Nov 28, 2023
Updated
Dec 2, 2024
Vendor
Zyxel Networks
Product
WBE660S Firmware
Classifications
CWE-269, CAPEC-122, CAPEC-233, CAPEC-58, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 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=6.65(ACGG.1)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zyxel Networks · WBE660S Firmwareversion=6.65(ACGG.1)
Zyxel Networks · Zyxel USG FLEX 50(W) Series Firmwareversion=versions 4.16 through 5.37
Zyxel Networks · WAX300H Firmwareversion=6.60(ACHF.1)
Zyxel Networks · WAC500 Firmwareversion=6.65(ABVS.1)
Zyxel Networks · Zyxel ATP Series Firmwareversion=versions 4.32 through 5.37
Zyxel Networks · NWA50AX Firmwareversion=6.29(ABYW.2)
Zyxel Networks · Zyxel USG20(W)-VPN Series Firmwareversion=versions 4.16 through 5.37
Zyxel Networks · Zyxel VPN Series Firmwareversion=versions 4.30 through 5.37
Zyxel Networks · Zyxel USG FLEX Series Firmwareversion=versions 4.50 through 5.37

Published CVSS scores

5.5Zyxel CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
CAPEC-122Privilege Abuse
CAPEC-233Privilege Escalation
CAPEC-58Restful Privilege Elevation
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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