DisclosureLens
HackingFinancial ServicesFinanceSupply Chain (3P Vendor)Customer Data InvolvedPIIIdentity (basic)Government IDHighContained

Various Data Owners, As Identified in Appendix to Letter

bd_2d4c9090f956773b · schema v1 · pii pii-v1

Severity

High

Discovered

May 20, 2021

Filed

Jul 2, 2021

To disclose

6 weeks

Affected · nationwide

33,443116 in this filing

Confidence

50%
Full breach record for Various Data Owners, As Identified in Appendix to Letter

Morgan Stanley, a financial services company, reported a data breach affecting various entities to whom it provides StockPlan Connect Services. The breach occurred at a third-party vendor, Guidehouse. The incident, which took place on January 20, 2021, and was discovered on May 20, 2021, involved an external system breach or hacking. The personal information of 116 Maine residents was compromised, including names and Social Security numbers. In response, Guidehouse offered affected individuals 24 months of credit monitoring and identity theft protection services through Experian IdentityWorks. Consumer notifications were sent on July 2, 2021.

Maine clockDiscovered May 20, 2021Filed with AG Jul 2, 202143d 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 · 120 days
discovery → filing · 6 weeks / 43 days

Jan 20, 2021

Begins

May 20, 2021

Discovered

Jul 2, 2021

Filed

vs. sector median

2 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed33,443 affectedView incident

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.