DisclosureLens
HackingProfessional ServicesProfessional ServicesVulnerability ExploitZero-DaySupply Chain (3P Vendor)Supply Chain (Dependency)Data ExfiltratedDownstream VictimsCustomer Data InvolvedPIIIdentity (basic)Government IDHighContained

WILLIS TOWERS WATSON US LLC

bd_8b25fc06c7db34e9 · schema v1 · pii pii-v1

Severity

High

Discovered

Jun 22, 2023

Filed

Aug 8, 2023

To disclose

7 weeks

Affected · nationwide

1,7654 in this filing

Linked

2 filings

Confidence

50%
Full breach record for WILLIS TOWERS WATSON US LLC →2 incidents on file

Willis Towers Watson US LLC and its affiliate Acclaris, Inc. reported a data breach affecting 4 Maine residents. The breach originated with a third-party vendor, Pension Benefit Information, LLC (PBI), which uses the MOVEit Transfer software. A zero-day vulnerability in MOVEit was exploited by a threat actor between May 29 and May 30, 2023, leading to data exfiltration. The compromised information includes names and Social Security numbers. The breach was discovered on June 22, 2023, and affected individuals were notified on August 10, 2023, with an offer of 24 months of identity monitoring services from Kroll.

Maine clockDiscovered Jun 22, 2023 → Filed with AG Aug 8, 202347d ⏱ ME AG >30d7 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 · 24 days
discovery → filing · 7 weeks / 47 days

May 29, 2023

Begins

Jun 22, 2023

Discovered

Aug 8, 2023

Filed

vs. sector median

11 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Filing propagation · 2 filings · 2 states

View merged incident ↗
Montana State AGAug 4 · first
Maine State AG+4d · this page

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.