Flagstar Bank, National Association — May 2023 breach

Clustered 15 filings across 9 jurisdictions · filing window Oct 5, 2023 → Dec 27, 2023. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

15 filings

States

Affected · reported

838,073

First → last filing

Oct 5, 2023 → Dec 27, 2023

Merge confidence

100%

incident inc_f6f7b87c91554789 · merged by deterministic · confidence 100%

Part of the FISERV, INC. supply-chain incident (2023) — at least 10 organizations filed notifications naming this third party.

Confirmed breach. Merged as one breach: 15 regulatory filings. The filings describe hacking. Intrusion May 27, 2023–May 31, 2023, discovered Jun 3, 2023 — the first regulatory filing landed 124 days later (flagged late). 838,073 individuals reported across the linked filings. Data reported: Government ID, Financial account, Identity (basic), and 1 more. Notifications rolled out on a 83-day schedule across 15 filings beginning Oct 5, 2023. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental

Notification delay

124days

Discovered → first regulatory filing

Discovery variance

151days

Range of discovered_at dates across filings

Filing span

83days

Time between earliest and latest filing

Not recorded for this incident

Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.

Regulatory clocksMaine✗ ME AG >90d · 124dWashington⏱ WA AG >30dMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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