CVE-2026-4795 PUBLISHED

Assigner: Zyxel
Reserved: 25.03.2026 Published: 26.05.2026 Updated: 26.05.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 6.5

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Zyxel
Product	GS1200-5v3 firmware
Versions	Default: unaffected Version <= 1.00(ACPS.2)C0 is affected

Vendor	Zyxel
Product	GS1200-8v3 firmware
Versions	Default: unaffected Version <= 1.00(ACPT.2)C0 is affected

Vendor	Zyxel
Product	GS1200-5HPv3 firmware
Versions	Default: unaffected Version <= 1.00(ACPU.2)C0 is affected

Vendor	Zyxel
Product	GS1200-8HPv3 firmware
Versions	Default: unaffected Version <= 1.00(ACPV.2)C0 is affected

Vendor	Zyxel
Product	GS1200-10v3 firmware
Versions	Default: unaffected Version <= 1.00(ACPW.2)C0 is affected

References

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

Problem Types

CWE-862: Missing Authorization CWE