HackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedGovernment IDIdentity (basic)CriticalContained

NATIONSTAR MORTGAGE LLC

bd_94029d67f539973d · schema v1 · pii pii-v1

Severity

Critical

Discovered

Oct 31, 2023

Filed

Dec 15, 2023

To disclose

6 weeks

Affected · nationwide

14,690,28459,917 in this filing

Linked

11 filings

Confidence

65%

Full breach record for NATIONSTAR MORTGAGE LLC →11 incidents on file

Nationstar Mortgage LLC (dba Mr. Cooper) reported an external system breach (hacking) occurring on October 30, 2023, discovered on October 31, 2023. The incident affected approximately 14,690,284 individuals, including 59,917 Maine residents. The breach compromised names and Social Security Numbers. Nationstar notified consumers in writing on December 15, 2023, and offered 24 months of TransUnion credit monitoring services.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Oct 31, 2023 → Filed with AG Dec 15, 202345d ⏱ ME AG >30d6 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 · 1 days

discovery → filing · 6 weeks / 45 days

Oct 30, 2023

Begins

Oct 31, 2023

Discovered

Dec 15, 2023

Filed

vs. sector median

2 wks faster

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Delaware State AGbd_1649a1b2c61961c42023-12-15Verified
California State AGbd_57eb457f3eb2112d2023-12-15Verified
Montana State AGbd_5d5578f4cbaaad522023-12-15Verified
Oregon State AGbd_bcd8a251801840a22023-12-15Verified

Show 6 more filings ↓up to 348d gap

Massachusetts State AGbd_d73092edf21768402023-12-15Verified
Washington State AGbd_ec18ec8370ea53762023-12-15Verified
South Carolina State AGbd_c8e492a4998540cc2023-12-18 · +3dVerified
New Hampshire State AGbd_66a3873bc3c9facf2023-12-19 · +4dVerified
California State AGbd_0b70ea800f8666122024-03-22 · +98dVerified
Illinois State AGbd_d9053568a4f8d29b2023-01-01 · +348dCandidate

Name: NATIONSTAR MORTGAGE LLC
norm: nationstar mortgage

Name: NATIONSTAR MORTGAGE LLC
norm: nationstar mortgage
Also named: Nationstar Mortgage LLCdba oflegal entity
Mr. Cooperdba oftrade name
Industry: Financial Servicesllm

Discovered: Oct 31, 2023
Breach occurred: Oct 30, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Dec 15, 2023
Affected individuals: 14,690,284state + nationwide
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Filed data breach notice with Maine Attorney General
Initial access: exploit_public_facing

During the incident: Sent written notification to affected consumers
Offered 24 months of TransUnion credit monitoring services
Changes made: Offered 24 months of TransUnion credit monitoring services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(45 days from discovery to filing)
Compliance flags: ME AG >30d · 45dME CRA notice due
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.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Oct 31, 2023
→ Filed with AG: Dec 15, 2023
45d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 31, 2023 → Filed with AG: Dec 15, 2023	45d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 10 states

View merged incident ↗

Illinois State AGJan 1 · first

Delaware State AG+348d

California State AG+348d

Montana State AG+348d

Oregon State AG+348d

Massachusetts State AG+348d

Washington State AG+348d

Maine State AG+348d · this page

South Carolina State AG+351d

New Hampshire State AG+352d

California State AG+446d

Pattern: first filing Jan 1 (IL), last Mar 22 (CA) — a 446-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/176a338a-f640-43d5-b975-5996823e7ce4.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 15, 2023
Raw hash: 208644fef365a827582342430b0dca05ab57b4fe0bdd1be86108f7ac404d2b8f

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityNATIONSTAR MORTGAGE LLC

Victim entityNATIONSTAR MORTGAGE LLC

Incidentdiscovered Oct 31, 2023

Stated responseSent written notification to affected consumers

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov