Release Date:

October 22, 2025

Enhancements:

The AV UI provides the following enhancements:

Support for new profiles:

Visionary Advanced Multi-Domain
G&D KVM-over-IP
Poly StudioNet Modular Room

Updated the default web browser protocol to HTTPS
Added interface descriptions that specify the VLAN ID, the profile name and the profile template
Updated AV profile descriptions
QoS is redesigned on the related profiles
Support for gPTP options on all AVB profiles
Upgraded OpenSSL package to OpenSSL3
Support for REST API:
Saves switch configuration
Enables or disables IGMP Plus

The firmware provides the following enhancement:

OpenSSH and OpenSSL packages are upgraded to 9.8p1 and 3.1.6 respectively. [CE-6663]

Bug Fixes:

This firmware addresses the following bugs:

Fixes the issue where the switch crashes when the configuration is cleared immediately after switch is turned on. [MS-4448]
Fixes the issue where switches do not learn ISDP neighbours. [MS-4491]
Fixes the issue where 224.0.1.129 PTP packet is not forwarded on M4300-52G. [MS-4953]
Fixes the issue where the switch fails to send an email notification alert when you use Gmail™. [CE-6352]
Fixes the issue where the SNMP community name changes. [CE-6517]
Fixes the issue where you can use insecure SSH key exchange (KEX) algorithms “diffie-hellman-group-exchange-sha256” and “diffie-hellman-group14-sha1”. [CE-6672]
Fixes the issue where MLD query packets flood in a large network. [CE-7028]

Known Issues:

This AV UI contains the following known issues:

In stacking units, an AV UI profile that is created on the primary management unit does not synchronize to member units. The profile on member units becomes a data profile.

Workaround: Create an AV UI profile separately on each stacking unit.

In the AV UI, you cannot configure the Fanout setting for a standby member of a stack of M4300-96X switches.

Workaround: Use the main UI to configure the Fanout setting.

When you configure the Force Multicast or Block Multicast settings for a LAG in the AV UI, the configuration is successfully applied to the switch, but the Force or Block icons do not display on the LAG port.
When you configure the Force Multicast or Block Multicast settings on one or several ports of a M4300-96X switch in the AV UI, the port status information (such as VLAN profiles, colors, and so on) no longer displays.
Workaround: Refresh the AV UI page.
An Auto-LAG does not form after you apply the G&D KVM-over-IP profile.

Workaround: Form the Auto-LAG before you apply the G&D KVM-over-IP profile. Additionally, apply the following command to the LAG and trunk interfaces to enable G&D device discovery: macfilter adddest 01:0F:F4:00:00:00 <pvid>

Occasionally, the main UI is not accessible from AV UI.

Workaround: Use the following link to access the switch through the main UI:

http://IP-Address:49151/v1/base/cheetah_login.html

This firmware contains the following known issues:

After you upgrade the firmware from 12.0.9.x to 12.0.11.x or a newer release, when you use the main UI, and you select Routing > Multicast > Mroute Static-Multicast Configuration, the page does not display automatically.
Workaround: After the firmware upgrade, clear your browser cache.
When Auto Negotiation is manually enabled through the CLI, it does not appear as enabled in the AV UI.
Workaround: Configure and verify Auto Negotiation through the CLI.
G&D Control Center IP devices fail to link up with the switch

Workaround: Manually set the switch port speed to 1G to establish the link.

Warnings:

Read and follow these warnings before updating your firmware:

For user passwords, line passwords, and enable passwords that are encrypted with AES in firmware release 12.0.15.7 or earlier releases, automatic migration is supported to the more secure SHA512 in release 12.0.17.6 or later releases.
User passwords, line passwords, and enable passwords that are encrypted with MD5 (salted) in firmware release 12.0.15.7 or earlier releases are not migrated to release 12.0.17.6 or later releases, so they must be set manually.
SNMPv3 MD5 and SHA-based passwords from firmware release 12.0.15.7 or earlier releases are not migrated to release 12.0.17.6 or later releases, so they must be set manually.

General Information:

boot code remains at the existing version 1.0.0.18 in this switch firmware.
The process of upgrading the firmware and boot code takes about three minutes. Apply the “update bootcode” command from the command line interface. Do not switch off or restart the device during the upgrade process.
AppMgr is upgraded to version 1.0.4.27 in this switch firmware.

Download Link: https://www.downloads.netgear.com/files/GDC/M4300/M4300_V12.0.19.15.zip

Firmware Checksum Details

File Name: M44300-v12.0.19.15.stk

MD5: 3FBE463343B6B7752CF04938683CA3EC

SHA-256: 5199CA09318C257134CCB07B88276002835BE60A63B2E39ABD117CF7588B1956

Firmware Update Instructions:

To update your product’s firmware, follow the instructions in your product’s user manual. To find your user manual, visit https://www.netgear.com/support/, enter your model number in the search box, and click the Documentation button on the product page.