2025.10

Warning

This release can cause BSOD and boot loops on some Windows computers. We do not recommend upgrading to this version if you are using Windows.

This release is for desktop only.

Here is a list of all changes since last stable release 2025.9:

Added

• Add helpful warnings when clearing account history. This helps users not lose their account
  numbers.

Windows

• Add additional logging for tunnel devices and split tunneling to problem reports.
• Log WFP sessions when transaction lock timeout occurs.

Changed

• Move placement of login button from inside the account number input to under account number.

Windows

• Implement UDP GSO for QUIC on client socket. This improves download speeds slightly.

Fixed

• Fix version being labeled unsupported unexpectedly. So far, this only an issue when using
  development builds.
• QUIC obfuscation only using one in-address when connecting. It will now randomly select one of
  the available in-addresses for each connection attempt.
• quinn_udp crate flooding mullvad-daemon.log with warnings.

macOS

• Fix apps attempting to use IPv6 with in-tunnel IPv6 disabled.
• Re-add missing loopback alias if removed. This fixes some issues with DNS resolution.

Security

Windows

• Block traffic to exit node from non-Mullvad processes. This fixes a leak where traffic could be
  encrypted once, but leave the entry node unencrypted, if and only if the destination were the exit
  node. E.g., this might occur if a browser tries to open a TCP connection to the exit node IP.