PT-2026-43176 · Zyxel · Gs1200-8V3+4

Pierre Hauweele · Published 2026-05-26 · Updated 2026-05-26 · CVE-2026-4795

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Zyxel GS1200-5v3 versions prior to 1.00(ACPS.2)C0 Zyxel GS1200-8v3 versions prior to 1.00(ACPT.2)C0 Zyxel GS1200-5HPv3 versions prior to 1.00(ACPU.2)C0 Zyxel GS1200-8HPv3 versions prior to 1.00(ACPV.2)C0 Zyxel GS1200-10v3 versions prior to 1.00(ACPW.2)C0

Description A missing authorization issue allows an unauthenticated attacker on the local area network (LAN) to read the system configuration from a log file by sending a specially crafted HTTP request.

Recommendations Update GS1200-5v3 to version 1.00(ACPS.2)C0 or later. Update GS1200-8v3 to version 1.00(ACPT.2)C0 or later. Update GS1200-5HPv3 to version 1.00(ACPU.2)C0 or later. Update GS1200-8HPv3 to version 1.00(ACPV.2)C0 or later. Update GS1200-10v3 to version 1.00(ACPW.2)C0 or later.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

BDU:2026-09013

CVE-2026-4795

Affected Products

Gs1200-10V3

Gs1200-5Hpv3

Gs1200-5V3

Gs1200-8Hpv3

Gs1200-8V3

References · 4

• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-missing-authorization-vulnerability-in-gs1200v3-series-switches-05-26-2026 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4795 · Security Note
• https://bdu.fstec.ru/vul/2026-09013 · Security Note
• https://t.me/CVEtracker/54944 · Telegram Post