CVE-2023-34138
📛 CVE Title
CVE-2023-34138
Description
A command injection vulnerability in the hotspot management feature of the Zyxel ATP series firmware versions 4.60 through 5.36 Patch 2, USG FLEX series firmware versions 4.60 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.60 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.60 through 5.36 Patch 2, and VPN series firmware versions 4.60 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device if the attacker could trick an authorized administrator to add their IP address to the list of trusted RADIUS clients in advance.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- Zyxel
- CVSS severity
- HIGH
- CVSS score
- 8.0 / 10
- CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Effective score
- 8.0 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-78 - Reserved
- 2023-05-26
- Published
- 2023-07-17 19:31 UTC
- Last updated
- 2024-10-30 19:02 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/34xxx/CVE-2023-34138.json
- Linked Threat
- CVE-2023-34138 — CVE-2023-34138
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2023-07-17 18:15:09 UTC
- NVD last modified
- 2026-06-17 06:02:58 UTC
- NVD CVSS v3.1
- 8.0 / 10 HIGH source: security@zyxel.com.tw
- NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Exploitability subscore
- 2.1 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0063 (probability of exploitation in next 30 days)
- EPSS percentile
- 45.57% vs all CVEs — higher = more likely to be exploited, as of 2026-06-30
NVD / KEV / EPSS data refreshed 2026-07-01 07:32 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2023-38240 - Assigner
- Zyxel
- Published
- Jul 17, 2023, 5:31:40 PM
- Updated
- Oct 30, 2024, 6:02:28 PM
- EUVD base score (CVSS 3.1)
-
8.0 / 10
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EUVD-reported EPSS
- 0.1300
- Vendors
- Zyxel
- Products
-
USG FLEX 50(W) series firmware (4.60 through 5.36 Patch 2)USG FLEX series firmware (4.60 through 5.36 Patch 2)VPN series Firmware (4.60 through 5.36 Patch 2)ATP series firmware (4.60 through 5.36 Patch 2)VPN series Firmware (4.60 through 5.36 Patch 2)USG20(W)-VPN series firmware (4.60 through 5.36 Patch 2)
- Aliases
-
GHSA-886j-wm8v-5q3q
ENISA description: A command injection vulnerability in the hotspot management feature of the Zyxel ATP series firmware versions 4.60 through 5.36 Patch 2, USG FLEX series firmware versions 4.60 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.60 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.60 through 5.36 Patch 2, and VPN series firmware versions 4.60 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device if the attacker could trick an authorized administrator to add their IP address to the list of trusted RADIUS clients in advance.
Affected products (5)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Zyxel | ATP series firmware |
4.60 through 5.36 Patch 2 (affected)
|
— |
| Zyxel | USG FLEX series firmware |
4.60 through 5.36 Patch 2 (affected)
|
— |
| Zyxel | USG FLEX 50(W) series firmware |
4.60 through 5.36 Patch 2 (affected)
|
— |
| Zyxel | USG20(W)-VPN series firmware |
4.60 through 5.36 Patch 2 (affected)
|
— |
| Zyxel | VPN series firmware |
4.60 through 5.36 Patch 2 (affected)
|
— |
Affected products — CPE 2.3 (44) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_2200-vpn_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_2200-vpn:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_atp100_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_atp100:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_atp100w_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_atp100w:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_atp200_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_atp200:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_atp500_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_atp500:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_atp700_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_atp700:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_atp800_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_atp800:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn100:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn2s_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn2s:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn300:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn50_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn50:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn_100_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn_100:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn_300_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn_300:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_vpn_50_firmware:*:*:*:*:*:*:*:*cpe:2.3:h:zyxel:zywall_vpn_50:-:*:*:*:*:*:*:*
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
MITRE references (1) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers security@zyxel.com.tw Vendor Advisory
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers af854a3a-2127-422b-91ae-364da2661108 Vendor Advisory
Remediations (16)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:knowledge.broadcom.com
The intent of this article is to help customers that are using VMware vSphere 8.x address the most critical security vulnerabilities. Broadcom will provide all perpetual license customers, including those that have expired support contracts, with access to zero-day security patches, which are defined by Broadcom as patches for Critical Severity Security Alerts with a Common Vulnerability ...
2026-06-15 21:11 UTC -
web:www.hipaajournal.com
CISA has released a new risk-based vulnerability remediation framework to help vendors assess vulnerabilities and prioritize patching effectively, concentrating their efforts on mitigating vulnerabilities in the most at-risk assets and addressing vulnerabilities that carry the greatest risk of exploitation.
2026-06-15 21:11 UTC -
web:www.microsoft.com
Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.
2026-06-15 21:11 UTC -
web:nvd.nist.gov
The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...
2026-06-15 21:11 UTC -
web:www.oracle.com
This Critical Patch Update contains 374 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at October 2025 Critical Patch Update: Executive Summary and Analysis.
2026-06-15 21:11 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-06-15 21:11 UTC -
web:support.servicenow.com
This document lists all the released Store applications and schema changes for Vulnerability Response and Configuration Compliance. Vulnerability Response and Configuration Compliance Compatibility Matrix
2026-05-22 06:39 UTC -
web:www.cisco.com
This document describes a list of software versions that have incorporated fixes for Cisco IOS® XE Software Web UI Cisco bug ID CSCwh87343.
2026-05-22 06:39 UTC -
web:www.oracle.com
Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.
2026-05-22 06:39 UTC -
web:access.redhat.com
Learn about our open source products, services, and company. You are here
2026-05-22 06:39 UTC -
web:www.techrepublic.com
Google patches eight high-severity Chrome vulnerabilities affecting 3.5 billion users. Here's why you should update and relaunch your browser now.
2026-05-22 06:39 UTC -
web:cyberinsider.com
Google has released Chrome 148, one of the largest security update batches in the browser's history, patching 127 vulnerabilities.
2026-05-22 06:39 UTC -
web:cyberpress.org
The third vulnerability, CVE -2026-44791 (GHSA-wrwr-h859-xh2r), is particularly alarming because it represents a patch bypass. It circumvents the previously issued fix for GHSA-hqr4-h3xv-9m3r in the XML node, reintroducing prototype pollution through a different code path. When chained with additional nodes, this too can escalate to RCE on the host.
2026-05-22 06:39 UTC -
web:cybersecuritynews.com
Google released a critical Chrome update fixing multiple high-risk vulnerabilities that could enable arbitrary code execution.
2026-05-22 06:39 UTC -
web:help.eset.com
Patch management helps ensure that systems and applications are secure against known vulnerabilities and exploits. The Patch management section lists all available patches remedying the detected vulnerabilities and makes the remediation process easier through automated software updates.
2026-05-22 06:39 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-22 06:39 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2023-34138.json.
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