DisclosureLens
HackingFinancial ServicesFinanceVulnerability ExploitStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPIIIdentity (basic)Financial accountLowContained

Flagstar Bank, National Association

bd_3b12cfc5dfe1d71f · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 22, 2021

Filed

Feb 24, 2023

To disclose

25 months

Affected

Not disclosed

Confidence

64%
Full breach record for Flagstar Bank, National Association →7 incidents on file

Flagstar Bank experienced a data breach involving its third-party vendor, Accellion. An unauthorized party exploited a vulnerability in the Accellion file-sharing platform, gaining access to Flagstar's information between December 3 and December 4, 2021. Flagstar was notified of the vulnerability on January 22, 2021, and promptly took the server offline and discontinued use of the platform. Forensic investigation confirmed that certain files containing personal information were accessed and/or acquired. Flagstar engaged third-party forensic experts, notified law enforcement, and is providing two years of identity monitoring services to affected individuals through Kroll.

California clockDiscovered Jan 22, 2021 → Notified Jun 17, 2022511d ✗ CA 60-day late25 months discovery → filing

Incident timeline

Dec 3, 2021

Begins

Feb 24, 2023

Filed

vs. sector median

+101 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.