Release Date:

August 13, 2026

Enhancements

• Support for the following new AV profiles:
  • Turtle Profile
  • Just Add Power
• Updated the following existing AV profiles:
  • Sonos: Updated profile configurations
  • AVoIP Lightware: Updated profile configurations
  • Audio-Technica: Updated default profile color
  • AES67: Updated profile descriptions
  • Nice Home Management: Updated profile name to Elan OS
  • Lighting: Updated profile description
• Addition of the Timeout column to the multicast table
• Addition of REST API support for L2/L3 multicast, PTP BC/TC, and port mirroring

Bug Fixes:

• Fixes the issue where downloading a configuration file with a non-ASCII character in port description to the switch fails. [CE-7073]
• Fixes the issue where the switch does not assign an IP address through DHCP. [CE-7335]
• Fixes the issue where bandwidth does not display in the AV UI port overview. [CE-7604]
• Fixes the issue where gradually increasing memory usage could cause the switch to reboot after extended runtime. [CESMB-7607]
• Fixes the issue where the documentation links under Help > Online Help > Support and User Guide do not work. [MS-5481]
• Fixes the issue where multicast SSDP packets do not flood after the configuration is cleared. [MS-5492]
• Fixes the issue where VLAN participation does not change when auto-trunk is present [CE-7771]
• Fixes the issue where changing a DHCP scope in the AV UI did not delete or update the first exception from the initial scope [CE-7915]

Known Issues:

• After a configuration clear, the original VLAN 1 profile lingers for up to 1 minute on first login. All configurations are cleared and there is no functional impact.

• If a PoE schedule is applied to the same port multiple times, only the most recent schedule takes effect. The device UI might display a conflicting schedule as active, but this status is not valid.
• Kramer AV Single-VLAN Profile Cannot Be Modified When Using VLAN 1:
  If a Kramer AV profile is created with a single VLAN and that VLAN is VLAN 1, the profile cannot be modified to another single-VLAN profile.
  Workaround: Use a VLAN ID other than VLAN 1 when creating a single-VLAN Kramer AV profile.
• 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 you manually enable the Auto Negotiation through the CLI, it does not display 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:

• The 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 1.0.7.18 in this switch firmware.

Download Link: https://www.downloads.netgear.com/files/GDC/M4300/M4300_V12.0.19.23.zip

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.