HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountLowContained

Flagstar Bank, National Association

bd_d88cc15ddbaabe7d · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Oct 5, 2023

To disclose

—

Affected

Not disclosed

Linked

15 filings

Confidence

66%

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

Flagstar Bank, N.A. notified California residents of a data breach involving its third-party vendor, Fiserv. Unauthorized actors exploited vulnerabilities in MOVEit Transfer software used by Fiserv for payment processing and mobile banking. The unauthorized activity occurred between May 27 and May 31, 2023. Customer information, including names and potentially financial account data, was disclosed. Flagstar offered two years of identity monitoring through Kroll.

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Incident timeline

May 27, 2023

Begins

Oct 5, 2023

Filed

This filing is one of 15 about the same incident.View merged incident

Part of FISERV, INC. supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Massachusetts State AGbd_25176ff42413efea2023-10-05Verified
Maine State AGbd_2d517ec1c38f95f82023-10-05Candidate
Indiana State AGbd_25963c4420d351012023-10-06 · +1dVerified
Oregon State AGbd_bebe196ceda9728b2023-10-06 · +1dVerified

Show 6 more filings ↓up to 83d gap

Maine State AGbd_267688291d7bda9f2023-11-05 · +31dVerified
Massachusetts State AGbd_a8b93efc400ce2172023-11-05 · +31dVerified
New Hampshire State AGbd_ba1cee24773c76652023-11-06 · +32dVerified
California State AGbd_93d56742578abcb32023-12-15 · +71dVerified
Maine State AGbd_5af88cb2aa8755e12023-12-27 · +83dVerified
Maine State AGbd_f45e64db77a72ae52023-12-27 · +83dVerified

Showing first 10 of 14 linked disclosures.

Name: Flagstar Bank, National Association
norm: flagstar bank national

Name: Flagstar Bank, National Association
norm: flagstar bank national
Industry: Financial Servicesllm

Discovered: —
Breach occurred: May 27, 2023 – May 31, 2023
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1195 Supply Chain Compromise
Threat actor: External
Third party: via Fiserv
Initial access: supply_chain

During the incident: Launched a comprehensive investigation
Identified individuals affected
Notified regulatory bodies
Offered complimentary free identity monitoring service through Kroll for two years
Changes made: Remediated all technical vulnerabilities
Patched systems in accordance with the MOVEit software provider’s guidelines
Mobilized a technical response team to examine the relevant MOVEit systems
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 6 states

View merged incident ↗

Massachusetts State AGOct 5 · first

Maine State AGOct 5 · first

California State AGOct 5 · first · this page

Indiana State AG+1d

Oregon State AG+1d

Maine State AG+31d

Massachusetts State AG+31d

New Hampshire State AG+32d

California State AG+71d

Maine State AG+83d

Pattern: first filing Oct 5 (MA), last Dec 27 (ME) — a 83-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 14 — the full spread may be wider.

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.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-574719
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 5, 2023
Raw hash: d3f4d8910c112923a269b79951c92e6bf3c112263adfc7dfc3ff89a2a3c24012

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityFlagstar Bank, National Association

Victim entityFlagstar Bank, National Association

IncidentThird-Party / Supply Chain

Stated responseLaunched a comprehensive investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov