A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,  GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00035.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Zyxel GS1200-5v3 firmware unaffected
Version Status Constraints
<= 1.00(ACPS.2)C0 affected —
Zyxel GS1200-8v3 firmware unaffected
Version Status Constraints
<= 1.00(ACPT.2)C0 affected —
Zyxel GS1200-5HPv3 firmware unaffected
Version Status Constraints
<= 1.00(ACPU.2)C0 affected —
Zyxel GS1200-8HPv3 firmware unaffected
Version Status Constraints
<= 1.00(ACPV.2)C0 affected —
Zyxel GS1200-10v3 firmware unaffected
Version Status Constraints
<= 1.00(ACPW.2)C0 affected —

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-missing-authorization-vulnerability-in-gs1200v3-series-switches-05-26-2026 cve-icon cve-icon
History

Tue, 26 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 26 May 2026 04:15:00 +0000

Type Values Removed Values Added
Title Missing Authorization Allows LAN‑Based Unauthenticated Read of System Configuration

Tue, 26 May 2026 02:15:00 +0000

Type Values Removed Values Added
Description A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,  GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Zyxel

Published:

Updated: 2026-05-26T12:18:03.665Z

Reserved: 2026-03-25T02:49:26.644Z

Link: CVE-2026-4795

cve-icon Vulnrichment

Updated: 2026-05-26T12:17:54.620Z

cve-icon NVD

Status : Deferred

Published: 2026-05-26T02:16:40.360

Modified: 2026-05-26T19:45:44.463

Link: CVE-2026-4795

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-26T04:00:13Z

Weaknesses