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Logitech Unifying receiver (Older)
Logitech Unifying receiver (Newer)

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The Logitech Unifying receiver is an extremely small dedicated USB wireless receiver, based on the nRF24L-family of RF devices,[1] that allows up to six compatible Logitech human interface devices (such as mice, trackballs, trackpads, and keyboards; headphones are not compatible) to be linked to the same computer using 2.4 GHz band radio communication. Receivers that are bundled with a Logitech product are paired with the device at the factory. When purchasing a replacement receiver or connecting multiple devices to one receiver, pairing requires the free-of-charge Logitech Unifying software, available for Microsoft Windows and Mac OS X. Although not compatible with Bluetooth, devices pair to Unifying Receivers in a similar way.[2] Peripherals remain paired, and can then be used on systems not supporting the software. Logitech receivers compatible with the Unifying protocol can be identified by the orange Unifying logo, which distinguishes them from Logitech Nano receivers of similar appearance, which pair in a similar manner but only with a single device, without using the Unifying protocol.

Logitech Unifying receivers (LURs) are often included in wireless Logitech keyboard, mouse, and combo sets, and may be purchased separately. Some Logitech peripherals allow a receiver to be stored inside.[3]

Logitech Unifying Software Mac 10.14

As of October 2019 Logitech Unifying Software for Windows had last been updated, to version 2.50.25, on 30 March 2010.[4]

Compatibility and use[edit]

Each peripheral device can pair to one receiver per profile. While most peripherals only store one profile, newer products such as the Logitech MX Master, MX Anywhere series, and M720 Triathlon allow multiple profiles. These devices can be connected to multiple receivers simultaneously. This allows the use of receivers in several computers, e.g., a desktop and a laptopcomputer, selecting the computer to use by changing profiles on the mouse. This multi-computer function is further augmented by Logitech Flow (software KVM solution) which is similar to Synergy. For devices without multi-computer support, the receiver and input devices can be moved together from one computer to another, maintaining their paired status after being unplugged, as the pairing information is held in the little USB receiver[2]—this is much simpler than transferring the peripheral from one receiver to another by changing the setup in software, and also avoids the limitation to 45 pairings of older devices. This also allows the use of peripherals on computing devices that do not support Unifying Software, e.g. devices supporting USB OTG with operating systems such as Android: first pair to the receiver on a PC or Mac.[5]

Support Logitech Com Software Unifying Mac

Some older Unifying devices limit the number of allowable pairing changes to a maximum of 45 times. Once the 45th connection is made, it is no longer possible to connect such a device to a different receiver. For users who often switch a Unifying device between multiple PCs or laptops with individual receivers, this connection limit can become an issue. For example, a user who frequently switches a mouse between two receivers (e.g. at work and home) will quickly exhaust the limit of available pairing switches.[6] Logitech advises customers with this issue to contact their Customer Care. Newer devices can switch pairings an unlimited number of times.

Pairing software is available from Logitech for Microsoft Windows and Mac OS X. Wireless devices using the Unifying Receiver are supported since Linux 3.2.[7]Software to manage Unifying devices on Linux is available from third party developers, such as Solaar.[8]

Many companies have made peripherals that connect via USB wireless receivers very similar to Logitech's; Logitech devices are incompatible with many of these 'off-brand' receivers[citation needed].


Several security vulnerabilities of the Logitech Unifying system have been reported in 2016 and 2019,[9] and patches released.

MouseJacking and keyjacking[edit]

MouseJacking, first reported by Bastille Networks, Inc.,[9] is the sending of malicious radio signals (packets) wirelessly to an unsuspecting user through Logitech Unifying wireless technology. The exploit takes advantage of a user's vulnerable Logitech Unifying receiver and unencrypted signals within a range of about 100 meters. Possible exploits include:

  • Keystroke injection by either spoofing a paired mouse or keyboard
  • Forced pairing

Logitech Unifying Software For Mac

Affected devices and firmware[edit]

DeviceUSB ID
Unifying receiver046d:c52b
Unifying receiver046d:c539
Logitech Wireless Gaming Mouse G900046d:c081
Logitech Wireless Keyboard K360046d:4004
Logitech Multi-Device Wireless Keyboard K370s046d:4061
Logitech Multi-Device Wireless Keyboard K375s046d:4061
Logitech Wireless Touch Keyboard K400r046d:400e, 046d:4024
Logitech Wireless Touch Keyboard K400 Plus046d:404d
Logitech Wireless Solar Keyboard K750046d:4002
Logitech Multi-Device Wireless Keyboard K780046d:405b
Logitech Illuminated Living-Room Keyboard K830046d:404c, 046d:4032
Logitech Performance Wireless Keyboard MK850046d:4062
Logitech Wireless Mouse M335
Logitech Zone Touch Mouse T400046d:4026
Logitech Wireless Mouse M545
Logitech Wireless Mouse M560
Logitech Touch Mouse M600046d:401a
Logitech Touch Mouse T620046d:4027
Logitech Wireless Rechargeable Touchpad T650046d:4101
RQR12 Firmware
Firmware VersionVulnerabilities
012.001.00019Affected by Bastille security issues #1, #2, #3[10][11]
012.003.00025Affected by Bastille security issues #1, #2, #3[10][11]
<012.005.00028Affected by Bastille security issues #1, #2, #3, #11, #13[10][11]
012.005.00028Affected by Bastille security issues #11, #13[10][11]
012.007.00029Affected by Bastille security issue #13[11]
RQR24 Firmware
Firmware VersionVulnerabilities
<024.003.00027Affected by Bastille security issue #2, #3, #11, #13[10][12]
024.003.00027Affected by Bastille security issue #11, #13[10][12]
024.005.00029Affected by Bastille security issue #13[12]

Firmware not affected[edit]

RQR12 Firmware
Firmware VersionNotes
012.009.00030Identical to 012.008.00030 but DFU signed[13]
RQR24 Firmware
Firmware VersionNotes
024.007.00030Identical to 024.006.00030 but DFU signed[14]


Logitech has released Unifying receiver firmware updates as new exploits were reported.[15][16]

Apple mac pro backup software. Set up Time Machine. Make sure your MacBook Pro is on the same Wi-Fi network as your external storage device, or connect your external storage device to your MacBook Pro. Click the System Preferences icon in the Dock, click Time Machine, then select Back Up Automatically.

For Linux users there are native options to flash and experiment with such as fwupd and MouseJack.[1] However, with these tools a separate firmware binary is still required. Flashing on a Linux host via a hypervisor such as VirtualBox along with a Windows virtual guest image and the Windows Logitech update executable is also possible. If using a Windows virtual guest, it is recommended to have a second available pointing device while the dongle is being updated. The second pointing device may be needed to allow the user to select and enable pass through of the unifying receiver via the hypervisor task bar after executing the firmware updater so that the device is found and updated.

Updating the Unifying receiver firmware to versions RQR12.08 or greater and RQR24.06 or greater can limit some functionality of certain paired devices unless the devices' firmware is also updated.

Other vulnerabilities[edit]

On July 9, 2019 another set of vulnerabilities was disclosed and documented by a different researcher.[9] A firmware update for Unifying receivers addressing the 'Encryption Key Extraction Through USB' vulnerability (CVE-2019-13054/55) was released on 28 August 2019.[16] Some users reported in 2019 that some Unifying devices are still being sold that are vulnerable to the original 2016 MouseJacking attack.[17]

See also[edit]


  1. ^ abNewlin, Marc (2016-08-07). 'MouseJack device discovery and research tools'. Retrieved 2019-07-25.
  2. ^ abGallegos, Gary. 'Gadgets: The Logitech Unifying Receiver (aka 'fake bluetooth')'. Archived from the original on 4 March 2016.
  3. ^'Logitech Unifying Multi-Connect Utility Setup Instructions'(PDF). Logitech.
  4. ^'Logitech Unifying Software'. Logitech Support + Download. Retrieved 3 October 2019.
  5. ^'Android Tablets and Logitech Unifying Devices'. Music Tribe. 7 January 2018.
  6. ^'Limitations on Unifying devices'. Archived from the original on 2019-07-10. Retrieved 2019-07-25.
  7. ^Nestor Lopez Casado (2011-09-15). 'HID: Add full support for Logitech Unifying receivers'. Linux kernel. Retrieved 2019-07-25.
  8. ^Solaar on GitHub
  9. ^ abcmame82 (2019-07-09). 'Summary / Overview of known Logitech wireless peripheral vulnerabilities'. Retrieved 2019-07-25.
  10. ^ abcdef'MouseJack Affected Devices'. Bastille Networks. Retrieved 2019-07-25.
  11. ^ abcdefViredaz, Marc (2017-12-22). 'RQR12.08 Build 0030'. Retrieved 2019-07-25.
  12. ^ abcdViredaz, Marc (2017-12-22). 'RQR24.06 Build 0030'. Retrieved 2019-07-25.
  13. ^Viredaz, Marc (2017-12-22). 'RQR12.09 Build 0030'. Retrieved 2019-07-25.
  14. ^Viredaz, Marc (2017-12-22). 'RQR24.07 Build 0030'. Retrieved 2019-07-25.
  15. ^LogiLaurie (2016-07-28). 'Logitech Response to Research Findings'. Archived from the original on 2019-07-09. Retrieved 2019-07-25.
  16. ^ ab'Logitech Unifying Receiver Update'. Logitech Support + Download. 28 August 2019.
  17. ^Hollister, Sean (2019-07-14). 'Why you should really, really update your Logitech wireless dongle'. The Verge. Retrieved 2020-01-02.

External links[edit]

  • Solaar on GitHub - Linux devices manager for the Logitech Unifying Receiver
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