CVE-2026-4795: Medium severity Zyxel GS1200-5v3 firmware vulnerability

Published May 26, 2026
·
Updated

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.

Affected Software

5 affected components
Zyxel GS1200-5v3 firmware<=1.00(ACPS.2)C0
Zyxel GS1200-8v3 firmware<=1.00(ACPT.2)C0
Zyxel GS1200-5HPv3 firmware<=1.00(ACPU.2)C0
Zyxel GS1200-8HPv3 firmware<=1.00(ACPV.2)C0
Zyxel GS1200-10v3 firmware<=1.00(ACPW.2)C0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Zyxel GS1200-5v3 to a version that resolves this vulnerability.

    Fixed in 1.00(ACPS.2)C0
  2. Upgrade

    Upgrade Zyxel GS1200-8v3 to a version that resolves this vulnerability.

    Fixed in 1.00(ACPT.2)C0
  3. Upgrade

    Upgrade Zyxel GS1200-5HPv3 to a version that resolves this vulnerability.

    Fixed in 1.00(ACPU.2)C0
  4. Upgrade

    Upgrade Zyxel GS1200-8HPv3 to a version that resolves this vulnerability.

    Fixed in 1.00(ACPV.2)C0
  5. Upgrade

    Upgrade Zyxel GS1200-10v3 to a version that resolves this vulnerability.

    Fixed in 1.00(ACPW.2)C0

Event History

May 26, 2026
CVE Published
via MITRE·01:42 AM
Data Sourced
via MITRE·01:42 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·02:16 AM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-4795?

The severity of CVE-2026-4795 is rated as medium with a score of 6.5.

2

What type of vulnerability is associated with CVE-2026-4795?

CVE-2026-4795 is a missing authorization vulnerability.

3

Which devices are affected by CVE-2026-4795?

CVE-2026-4795 affects Zyxel GS1200-5v3, GS1200-8v3, GS1200-5HPv3, GS1200-8HPv3, and GS1200-10v3 firmware versions.

4

How do I fix CVE-2026-4795?

To fix CVE-2026-4795, update the firmware of the affected Zyxel devices to the latest version provided by the vendor.

5

Is there a workaround for CVE-2026-4795?

There is no specific workaround for CVE-2026-4795; the best mitigation is to apply the firmware update.

Company

Resources

Contact

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