HackingFinancial ServicesFinanceVulnerability ExploitZero-DayData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Identity (basic)Government IDMediumContained

Flagstar Bank, National Association

bd_6e65b118877be0c8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Oct 5, 2023

To disclose

—

Affected

278state residents only

Linked

15 filings

Confidence

66%

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

Flagstar Bank, N.A. notified the New Hampshire Attorney General on October 5, 2023, regarding a third-party vendor breach involving Fiserv's MOVEit Transfer system. Unauthorized actors exploited a zero-day vulnerability to access vendor files containing customer personal information (names, SSNs, DOBs) between May 27-31, 2023. The incident affected 278 New Hampshire residents. Flagstar's own systems were not directly compromised. Remediation included vendor patching and offering two years of complimentary identity monitoring via 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: Oct 5, 2023
Affected individuals: 278state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Office of the Attorney General, Consumer Protection & Antitrust Bureau
Initial access: exploit_public_facing

During the incident: Vendor launched a comprehensive investigation
Vendor identified individuals affected and notified regulatory bodies
Vendor remediated all technical vulnerabilities and patched systems
Vendor mobilized a technical response team to examine relevant MOVEit systems
Flagstar arranged for complimentary free identity monitoring service through Kroll for two years
Changes made: Vendor remediated all technical vulnerabilities and patched systems in accordance with the MOVEit software provider’s guidelines
Vendor mobilized a technical response team to examine the relevant MOVEit systems and ensure that there were no further vulnerabilities
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

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/flagstar-bank-20231005.pdf
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: 3807a6af68acaebf73cca6d356dccf205583fd0cbb37f3a6a5c75d186d6f37aa

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityFlagstar Bank, National Association

Victim entityFlagstar Bank, National Association

IncidentThird-Party / Supply Chain

Stated responseVendor launched a comprehensive investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov