HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedData ExfiltratedIdentity (basic)Government IDFinancial accountMediumContained

McKinney & Company, CPA's

bd_33033b5c6e785222 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 1, 2020

Filed

Jun 12, 2020

To disclose

10 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

64%

Full breach record for McKinney & Company, CPA's →2 incidents on file

McKinney & Company, CPA notified clients that an unauthorized third party accessed their system in April 2020, potentially acquiring names, Social Security numbers, and bank account information. The firm secured its tax software, engaged external cybersecurity professionals, and notified the IRS. Clients are offered one year of credit monitoring.

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California clockDiscovered Apr 1, 2020 → Notified May 6, 202035d ✓ CA 60-day OK10 weeks discovery → filing

Incident timeline

discovery → filing · 10 weeks / 72 days

Apr 1, 2020

Begins

Apr 1, 2020

Discovered

Jun 12, 2020

Filed

vs. sector median

8 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Montana State AGbd_16bf531155cc08342020-06-02 · +10dCandidate
Indiana State AGbd_ae52e2ba884cf7452020-06-02 · +10dVerified

Name: McKinney & Company, CPA's
norm: mckinney company cpa s
Domain: katz-mckinney.com

Name: McKinney & Company, CPA's
norm: mckinney company cpa s
Domain: katz-mckinney.com
Industry: Professional Servicesllm

Discovered: Apr 1, 2020
Breach occurred: Apr 1, 2020 – Apr 30, 2020
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 6, 2020
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified the Internal Revenue Service

During the incident: Secured our tax software
Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals to analyze our internal systems
Notified the Internal Revenue Service of the issue
Offering a one-year membership in Experian IdentityWorksSM Credit 3B
Set up a dedicated and confidential toll-free response line
Changes made: Taken steps to prevent further unauthorized access to client records
Continually evaluate and modify our practices to enhance the security and privacy of our clients’ information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(72 days from discovery to filing)
Compliance flags: CA 60-day OK · 35d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Apr 1, 2020
→ Notified: May 6, 2020
35d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Apr 1, 2020 → Notified: May 6, 2020	35d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Montana State AGJun 2 · first

Indiana State AGJun 2 · first

California State AG+10d · this page

Pattern: first filing Jun 2 (MT), last Jun 12 (CA) — a 10-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://oag.ca.gov/ecrime/databreach/reports/sb24-190825
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 12, 2020
Raw hash: 010ce30c799af619121fd14a8b12d869d3abba3fa0425c4695db5611b59bd128

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMcKinney & Company, CPA's

Victim entityMcKinney & Company, CPA's

Incidentdiscovered Apr 1, 2020

Stated responseSecured our tax software

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov