Another biometrics vulnerability from Redmond (Windows Hello compromise)

Very interesting…..

I don’t think this represents a risk to my laptop itself or the data stored on it, given that “has access to a local admin account” already puts the laptop itself in game-over territory. However it seems like a substantial risk to lateral-movement (using a compromised device to log into other devices). With Bitwarden (versions <= 2025.08.0), this could happen by gaining access to Windows Credential manager and therefore the encryption key to my Bitwarden vault.

Keeping my focus on Bitwarden, I have a few initial observations:

  1. Bitwarden would be well served to prioritize “Unlock with Device”, in addition to the existing “Login with Device” so that I can use my phone’s biometrics in lieu of Hello.

  2. This likely will delay any efforts to fix “ Unable to unlock Bitwarden desktop app on app start using Windows Hello ".

  3. Bitwarden had some extremely lucky foresight in releasing 2025.08.0. P.R. wise, they might well be ahead of their peers on this one.

  4. It will be interesting to see how Bitwarden, other password managers, and Microsoft react to this. None of them are having a good day.

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