Dashlane issues opaque advisory warning 20 encrypted vaults were stolen

There’s a lot that doesn’t add up in a security advisory password manager Dashlane published Monday, warning that attackers managed to obtain 20 encrypted user vaults.

“Starting on Sunday, May 31, 2026, an external party launched a brute force attack against certain Dashlane user accounts,” the company said. “The goal of the attack was to brute-force two-factor authentication (2FA) protections to allow the attacker to register new devices on existing user accounts.”

Hello, Dashlane, anybody home?

A Dashlane user who received such a 2FA request provided this screenshot of the notification, which arrived on Sunday.

The UK-based user was concerned and contacted Dashlane through a support bot. Ultimately the user got no information about why the notification was sent.

“Then [I] discovered this news from Mastodon infosec and not Dashlane themselves,” the user told me. “Currently trying to find out what has happened! Because how can you trigger a...

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