HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

CUSHMAN & WAKEFIELD, INC.

bd_cdf44100b3bfaed9 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 29, 2026

Filed

Aug 7, 2026

To disclose

14 weeks

Affected

20state residents only

Linked

7 filings

Confidence

65%

Full breach record for CUSHMAN & WAKEFIELD, INC. →2 incidents on file

Cushman & Wakefield notified the Massachusetts Attorney General of a data security incident discovered on April 29, 2026. An unauthorized third party accessed and exfiltrated certain files containing personal data, including names. The company engaged third-party cybersecurity experts, reset credentials, implemented heightened monitoring, and notified law enforcement. No indication of misuse was found. Affected individuals are offered 24 months of Experian IdentityWorks.

J jump to incidentP pin to compareR raw source

Massachusetts clock✗ MA AG >90d14 weeks discovery → filing

Incident timeline

discovery → filing · 14 weeks / 100 days

Apr 29, 2026

Discovered

Aug 7, 2026

Filed

vs. sector median

4 wks faster

This filing is one of 7 about the same incident.View merged incident

A leak claim by shinyhunters about this victim predates this filing by 95 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Siteshinyhuntersbd_94dad4d39b7268ca2026-05-03 · +96dVerified by operator
Leak Siteqilinbd_f94238367dc882872026-05-03 · +96dVerified by operator

Regulatory filings (4) · sorted by filing gap

Vermont State AGbd_1baa16367dbbe7a12026-08-07Verified by operator
New Hampshire State AGbd_27631192cebaf0702026-08-07Verified
California State AGbd_ad8121b21cc043a92026-08-07Verified by operator
Pressshinyhuntersbd_73d80c5e639295172026-04-29 · +100dCandidate

Name: CUSHMAN & WAKEFIELD, INC.
norm: cushman wakefield
Domain: cushmanwakefield.com

Name: CUSHMAN & WAKEFIELD, INC.
norm: cushman wakefield
Domain: cushmanwakefield.com
Industry: Professional Servicesllm

Discovered: Apr 29, 2026
Materiality determined: —
Notification sent: Aug 7, 2026
Affected individuals: 20state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External

During the incident: Investigated the incident and secured our network with the assistance of third-party cybersecurity experts
Performed a broad-based reset of system passwords and access credentials
Implemented heightened monitoring across our environment
Notified law enforcement
Changes made: Offering complimentary access to Experian IdentityWorks for 24 months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(100 days from discovery to filing)
Compliance flags: MA AG >90dLeak >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 4 states

View merged incident ↗

PressApr 29 · first

Vermont State AG+100d

New Hampshire State AG+100d

California State AG+100d

Massachusetts State AG+100d · this page

Pattern: first filing Apr 29, last Aug 7 (MA) — a 100-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.mass.gov/doc/2026-1309-cushman-wakefield/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 7, 2026
Raw hash: e0d4ca11706bae202ae58edb19de98ec8742730a568510ac5ebbf8f35964a3a1

Linked disclosures

Ransomware claims (2)

Regulatory filings (4) · sorted by filing gap

Reporting entityCUSHMAN & WAKEFIELD, INC.

Victim entityCUSHMAN & WAKEFIELD, INC.

Incidentdiscovered Apr 29, 2026

Stated responseInvestigated the incident and secured our network with the assistance of third-party cybersecurity experts

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov