HackingRetail & ConsumerRetailStolen CredentialsCapture Stored DataTargetedData ExfiltratedIdentity (basic)Government IDMediumContained

Cornerstone

bd_0b1a3c6a4425dd32 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 9, 2019

Filed

Aug 20, 2019

To disclose

6 weeks

Affected

2state residents only

Confidence

66%

Full breach record for Cornerstone →2 incidents on file

Cornerstone, Inc. notified the NH AG of a data incident where an unauthorized actor accessed a database containing rental applications between June 26-28, 2019. Discovered July 9, 2019, the breach affected 2 NH residents, exposing PII including SSNs and driver's licenses. Response included disabling the app, resetting credentials, FBI notification, and 1-year credit monitoring.

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Incident timeline

undetected · 13 days

discovery → filing · 6 weeks / 42 days

Jun 26, 2019

Begins

Jul 9, 2019

Discovered

Aug 20, 2019

Filed

vs. sector median

2 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed2 affectedView incident

Name: Cornerstone
norm: cornerstone
Domain: cornerstone.edcast.com

Name: Cornerstone
norm: cornerstone
Domain: cornerstone.edcast.com
Industry: Retail & Consumerllm

Discovered: Jul 9, 2019
Breach occurred: Jun 26, 2019 – Jun 28, 2019
Undetected for: 13 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 19, 2019
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified the FBI about this incident
Initial access: valid_credentials

During the incident: Disabled its online rental application process
Resetting user credentials
Notified the FBI about this incident
Offering notified individuals complimentary credit monitoring and identity protection services for one year through TransUnion
Changes made: Enhanced the security of personal information in its possession
Disabled its online rental application process
Resetting user credentials
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(42 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/cornerstone-20190820.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 20, 2019
Raw hash: d384545b05f87ade67bb4f648defa8f183d452e719b8848734aba07fc30ae758

Reporting entityCornerstone

Victim entityCornerstone

Incidentdiscovered Jul 9, 2019

Stated responseDisabled its online rental application process

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov