CVE-2026-0420: Missing TLS certificate validation in NETGEAR's ReadyCloud client app

Published Jun 9, 2026
·
Updated

An improper implementation of TLS certificate validation vulnerability found in NETGEAR's ReadyCloud client app which could allow an attacker to perform attacker-in-the-middle (MiTM) style attacks impacting the product's confidentiality. This vulnerability affects the listed NETGEAR models.

Affected Software

11 affected components
Netgear ReadyCLOUD client
All of the following
Netgear Rax120 Firmware<1.2.9.52
Any of the following
Netgear RAX120
Netgear RAX120=1.0
Netgear RAX120=2.0
All of the following
Netgear Rax35 Firmware<1.0.6.106
Netgear RAX35
All of the following
Netgear Rax38 Firmware<1.0.6.106
Netgear RAX38
All of the following
Netgear Rax40 Firmware<1.0.6.106
Netgear RAX40

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade RAX120v1 to a version that resolves this vulnerability.

    Fixed in V1.2.9.52
  2. Upgrade

    Upgrade RAX120v2 (Nighthawk AX12 12-Stream AX6000 WiFi Router) to a version that resolves this vulnerability.

    Fixed in V1.2.9.52
  3. Upgrade

    Upgrade RAX35 to a version that resolves this vulnerability.

    Fixed in V1.0.6.106
  4. Upgrade

    Upgrade RAX38 to a version that resolves this vulnerability.

    Fixed in V1.0.6.106
  5. Upgrade

    Upgrade RAX40 to a version that resolves this vulnerability.

    Fixed in V1.0.6.106
  6. Compensating control

    Retire devices marked as End-of-Support (EoS) and replace them with newer, supported NETGEAR devices to ensure continued security updates and support.

  7. Operational

    Check each device's firmware version and, if the listed fixed version is not installed, update the device firmware to the fixed version (or to the latest available) via NETGEAR support. Note: devices with automatic updates enabled may already have the patch applied.

Event History

Jun 9, 2026
CVE Published
via MITRE·03:50 PM
Data Sourced
via MITRE·03:50 PM
RemedyDescriptionWeakness
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-0420?

The severity of CVE-2026-0420 is assessed as medium with a CVSS score of 4.6.

2

How do I fix CVE-2026-0420?

To fix CVE-2026-0420, ensure your NETGEAR ReadyCloud client app is updated to the latest firmware version.

3

What is the risk associated with CVE-2026-0420?

CVE-2026-0420 presents a risk of potential attacker-in-the-middle (MiTM) attacks due to missing TLS certificate validation.

4

Which NETGEAR products are affected by CVE-2026-0420?

CVE-2026-0420 affects various NETGEAR models that utilize the ReadyCloud client app.

5

When was CVE-2026-0420 published?

CVE-2026-0420 was published on June 9, 2026.

Company

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