Product=Fritz_Box_HW272 (FRITZ!Box 5590 Fiber)
Type=Release
Version=08.20
Releasecycle=Smart24 P2
Build=129227
OEMs=avm 1und1 avme
Countries=049 99 0234 0255 0256 0264 0267 027 030 031 032 033 034 0351 0352 0353 0357 0358 036 0371 0372 0376 0382 0385 0386 0387 0389 039 041 0420 0421 043 044 045 046 047 048 054 061 064 066 0972
Languages=de en es it fr pl nl
Revision=81983c0cfc6b11ee824a6044161d983a56993d6e
Info
Produkt: FRITZ!Box 5590 Fiber
Version: FRITZ!OS 8.20
Language: Dutch, English, French, German, Italian, Polish, Spanish
Release date: 12.02.2026
With each FRITZ!OS update, FRITZ! also updates its security functions. Therefore we recommend performing the update for all devices.
New features:
- The new Online Monitor offers a clear graphical overview of the internet usage of top consumers and selected home network devices
- Mesh optimization - for greater stability and improved data throughput, FRITZ!Repeaters independently select the ideal connection in the Mesh
- More options for triggering routines in the smart home and many other interesting new features
- The new, easy-to-use FRITZ!NAS sharing function makes it possible to share a folder, for example to collect and share photos after a family celebration
- Simplified user guidance for the parental controls - access profiles and the home network devices assigned to it are now clearly displayed
- Protection against internet connection failure: FRITZ! Failsafe automatically switches to a substitute connection, for example via mobile network
- Reduce the FRITZ!Box’s energy consumption with EEE (Energy Efficient Ethernet) Can now be individually configured for the WAN or LAN sockets
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.
New features and improvements in FRITZ!OS 8.20
Internet:
- NEW Display of the utilization of the network segment where own subscriber connection is located, based on own utilization and utilization by neighboring users
- NEW With the new internet fallback protection, the FRITZ!Box always stays online: If the internet connection fails, an alternative internet connection is established via an access device, e.g. via the mobile network with FRITZ!Box 6820 LTE
- NEW Online Monitor shows the network devices with the highest utilization of the internet connection (top consumers)
- NEW The Online Monitor for “individual devices” also displays the total current utilization of devices that were not selected individually
- NEW Simplified user guidance on the “Filter” pages (parental controls)
- Improved In the Online Monitor the display of the utilization of the internet connection allows selection of not only one day or two months but also an interval of 2 weeks
- Improved Device selection for display and data recording simplified in the Online Monitor
- Improved Reworked diagrams and colors in the Online Monitor
- Improved Online Monitor: Reworked display in the diagrams for the utilization of the internet connection
- Improved For the internet service provider 1&1 Telecom GmbH, the opportunity to switch to an internet connection via WAN is offered under “Internet > Account Information”
- Improved Improved stability when there are many simultaneous requests to internet services
- Improved Telekom Easy Support: Simplified configuration on Telekom fiber optic or DSL line enabled for internet access and telephone numbers
- Improved Port 443 (HTTPS, QUIC) is taken into account when the network application “Surfing” is prioritized
- Improved In the access profiles for parental controls, it is now possible to select whether network applications should be blocked or allowed
- Improved Number of tickets to extend online time for devices blocked by parental controls was increased from 10 to 12
- Improved In the parental controls, limited online time for a network device can now be easily extended by 45 minutes
Mesh:
- NEW Automatic detection of device type (e.g. smartphone, computer, or printer) for devices displayed in the Mesh Overview
- NEW Intelligent networking: FRITZ! products in the Mesh assess and optimize the connections among each other
- NEW Simplified login to Mesh Repeaters via the Mesh Overview of the Mesh Master
Telephony:
- NEW Caller announcements for the integrated answering machine can now also be entered as text (text-to-speech)
- Improved Support for the Vodafone IP Anlagen Anschluss
DECT/FRITZ!Fon:
- Improved Podcasts can automatically continue from where they left off, even after a long interruption
- Improved Revised menu order and dialogs in the FRITZ!Fon user interface
Home Network:
- NEW Save energy in the home network: EEE (Energy Efficient Ethernet) can now be set separately for each WAN/LAN port
- Improved Completely reworked network settings for improved user-friendliness
Smart Home:
- NEW In the FRITZ!Box user interface of the Mesh Master, the registration of smart home devices with another FRITZ!Box or a FRITZ!Smart Gateway can be started
- NEW Data read by the FRITZ!Smart Energy 250 from the export meter is shown under “Smart Home > Devices and Groups”
- NEW With FRITZ!Smart Control 440, the following functions can now be controlled: the boost and frost protection functions for radiator controls, color and color temperature for lamps, activation and deactivation of routines, and the display of the QR code for Wi-Fi
- NEW Routines can also be triggered by a phone call, by reaching a target temperature, or by activating boost or antifreeze functions, as well as by important events on the FRITZ!Box
- NEW Templates and routines can be triggered with delay
- Improved The schedule for a radiator control can be disabled without discarding the configured schedule
- Improved Roller shutters can now be combined into groups
- Improved Color and brightness transitions have been improved in the controls for Zigbee lights
Storage (NAS):
- Improved Better interoperability with FTP applications (e.g. Filezilla) through support for MFMT command
Security:
- Improved Push mail now also sends notifications about logins from FRITZ!Apps
- Improved DNS rebind protection now also supports umlaut domains
System:
- Improved File name for saved settings now includes name of individual FRITZ!Box
- Improved The “Diagnostics > Function” page now displays information on problems with time synchronization via NTP
- Improved If the configured/provisioned time server fails, automatic switch to public server
- Improved “Forgot Password” function of the push service can now be configured with a freely chosen recipient
- Improved Functional diagnostics now indicates when access for apps (TR-064) is disabled in the home network sharing settings
- Improved Reworked pages of the update functions under “System > Update”
- Improved Indication of disabled TR-064 added to the Function diagnostics
- Improved Reworked user guidance for backing up or restoring settings
- Improved Warning on the overview page when push service is interrupted
Improved With “Diagnostics > Function” the services for the Network Time Protocol are checked and relevant information displayed about any errors found - Improved Support of IPv6 configuration for fallback protection
- Improved Push service emails now clearly differentiate between function and security diagnostics through specific subject lines, adapted email texts, and file names
- Improved Accessibility support for FRITZ!Box, FRITZ!Mesh Set Master, and FRITZ!Fon (in accordance with GAA Ordinance)
Additional Improvements in FRITZ!OS 8.20
Internet:
- Changed FRITZ! devices in the home network, e.g. FRITZ!Repeaters, are no longer offered in parental controls and prioritization; they always have unrestricted internet access with normal priority
- Changed Private IPv4 addresses (RFC 1918) are no longer posted via MyFRITZ!Net (DNS) if a publicly accessibly IPv6 address is available
- Changed When VPN connections are active for which all network traffic is routed via the VPN connection (“full tunnel”), the guest network is excluded from this and routed over the normal internet connection
- Changed Number of network devices for which the saving of internet data rates can be enabled was increased to 40
- Fixed Enabling the UPnP filter had no effects for IPv6
- Fixed For providers without support for IPv6, the Online Meter did not count consumption values as long as IPv6 was enabled in the account information of the FRITZ!Box
- Fixed Possible internet disruptions when using a large filter list for blocked websites
- Fixed In some cases, connecting to the internet manually via “Reconnect” in the online monitor took a very long time
- Fixed For FRITZ! devices operated exclusively via IPv6, under some circumstance there was no search for new FRITZ!OS versions (updates)
- Fixed Creation of new WireGuard VPN connections could fail if many WireGuard VPN connections had already been created
- Fixed Under certain circumstances, a FRITZ! device operated exclusively via IPv6 could not obtain the system time via the Network Time Protocol
- Fixed The rate information in the Online Meter showed an incorrect end of the billing period
- Fixed The summary of individual access profiles for parental controls displayed “No restriction” despite restrictive settings
- Fixed Potential incorrect display in the Online Meter of the use of data capacity during the billing period
Wi-Fi:
- Changed Incongruous information text for configuration of the Wi-Fi guest access on the Mesh Repeater removed
- Fixed Login problems with Google Pixel 8 after DFS event (5 GHz)
- Fixed Problems with enabling the spectrum after “puncturing event” (5 GHz)
Telephony:
- Changed Network adjustment to Deutsche Telekom telephony
Home Network:
- Fixed In rare cases the information on a new network device in the home network was not immediately entered in the event log or change notice
- Fixed In special scenarios it was possible for the IP address 192.168.178.1 to be displayed for a repeater in the home network instead of its own address
- Fixed Incorrect configuration could lead to restart after update in certain rare cases
- Fixed Preview of personalized subject line from push service shows the suggested parentheses only if they were actually entered
- Fixed “Home Network > Network Connections” page was not displayed (empty page) when a FRITZ!Box was configured as an internet gateway and a Mesh Repeater
System:
- Fixed Push service sent the Forgot Password link of devices configured as IP clients with the incorrect IP address
- Fixed Despite correct rate settings, the “Info” LED did not flash when online volume exhausted
- Fixed Preview of personalized subject line from push service shows the suggested parentheses only if they were actually entered
