FRITZ!OS is the software of the FRITZ!Box. Use the online update function to easily download the newest FRITZ!OS version into your FRITZ!Box. Information on updates for devices you received from your cable provider will be supplied by your cable provider. In this case, updates will be performed by your cable provider.

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Product:        FRITZ!Box 6690 Pro

Version:        FRITZ!OS 8.26

Language:       English, French, German, Italian, Polish, Spanish, Dutch

Release date:   02/09/2026

```

With each FRITZ!OS update, FRITZ! also updates its security functions. Therefore we recommend performing the update for all devices.

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Below you find a complete list and descriptions of the new functions in the latest FRITZ!OS, along with a list of further improvements in this version.

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# Initial release: FRITZ!OS 8.25

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# Further improvements in FRITZ!OS 8.26

## Internet:
- **Fixed** After changing the country and time zone settings, the Online Monitor could no longer be opened
- **Fixed** Blocking of devices in the guest network in parental controls did not work as expected

## Wi-Fi:
- **Fixed** Channel bandwidth limited to 80 MHz in the 5-GHz band after restart 
- **Fixed** Connection problems with devices that support MLO
- **Fixed** Potential problems registering Wi-Fi 7 devices with the 2.4-GHz access point
- **Fixed** Reduced data throughput with Sony PS4 consoles fixed
- **Fixed** When a channel in the 5-GHz band was manually configured, the maximum possible channel bandwidth was not always used for transmission
- **Fixed** When using a device with Wi-Fi 7, no connections with MLO were displayed under "Wi-Fi connection" in the properties of the network device (all boxes with Wi-Fi 7)
- **Fixed** Wireless access points were not always active after deactivation of the MAC filter
- **Improved** Stability

## System:
- **Improved** Stability
- **Fixed** The LED display did not indicate active Zigbee registrations

## Repeater:
- **Fixed** After detecting radar, occasionally the Wi-Fi channel width remained restricted to 80 MHz
- **Fixed** After the 2.4-GHz connection was lost briefly, it was not reliably reconnected

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Instructions for installing an update:

Use the update function offered in the user interface to install the update. This automatically offers you the right FRITZ!OS. Click "Wizards", select "Update" and then follow the instructions on the screen.

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© FRITZ! GmbH 2004-2026. All rights reserved.

This FRITZ! firmware package contains files that are propagated under different licenses, in particular under a license held by FRITZ! or under an open-source license (namely the GNU General Public License, GNU Lesser General Public License or FreeBSD License). For details on the various licenses, see the "license.txt" file (https://download.avm.de/fritzbox/license.txt). The source code of the files propagated as open source files can be obtained upon a written request to fritzbox_info@avm.de.

FRITZ! grants the non-exclusive right to use this FRITZ! firmware package, which is supplied exclusively in object code format.  Licensee shall be entitled to make a copy exclusively reserved for personal backup purposes (backup copy).
FRITZ! reserves all intellectual property rights except as expressly granted herein. Without previous approval in writing, and except for in cases permitted by law, it is particularly forbidden for this FRITZ! firmware packet to be
- copied, propagated, or in any other manner made publicly accessible, or
- processed, disassembled, reverse engineered, translated, decompiled or in any other manner "opened" and subsequently copied, propagated or made publicly accessible in any other manner.

JFA 2026/09/01