HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedTargetedFinancial accountIdentity (basic)Government IDHighContained

Flagstar Bank, National Association

bd_fa165c20bad2c961 · schema v1 · pii pii-v1

Severity

High

Discovered

Aug 3, 2023

Filed

Oct 5, 2023

To disclose

9 weeks

Affected

2,412state residents only

Linked

16 filings

Confidence

70%

Full breach record for Flagstar Bank, National Association →6 incidents on file

Flagstar Bank, N.A. filed a supplemental notice with the Washington AG regarding a third-party vendor incident involving Fiserv's MOVEit Transfer software. The breach, caused by a zero-day vulnerability, occurred May 27-31, 2023. It impacted 2,412 Washington residents with personal information including names and government IDs. Flagstar engaged Fiserv to investigate, patch systems, and provide two years of Kroll identity monitoring.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d9 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 68 days

discovery → filing · 9 weeks / 63 days

May 27, 2023

Begins

Aug 3, 2023

Discovered

Oct 5, 2023

Filed

vs. sector median

+1 wks slower

This filing is one of 16 filings 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
Indiana State AGbd_25963c4420d351012023-10-06 · +1dVerified
South Carolina State AGbd_45458777328109652023-10-06 · +1dVerified by operator
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 15 linked disclosures.

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

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

Discovered: Aug 3, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 68 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 2,412state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameSocial Security numberFinancial account numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Notified Washington State Office of the Attorney General
Third party: via Fiserv
Initial access: exploit_public_facing

During the incident: Vendor launched a comprehensive investigation
Vendor identified individuals affected
Vendor 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.

Time to disclose: 9 weeks(63 days from discovery to filing)
Compliance flags: WA AG >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 8 states

View merged incident ↗

Massachusetts State AGOct 5 · first

Washington State AGOct 5 · first · this page

Indiana State AG+1d

South Carolina 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 15 — 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA26704.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: dcdc8c60fb009cb2c731bc23c3df29c6194a2a9ef92b245c0c8ce77637a70304

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityFlagstar Bank, National Association

Victim entityFlagstar Bank, National Association

Incidentdiscovered Aug 3, 2023

Stated responseVendor launched a comprehensive investigation

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com