HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedFinancial accountHealth (basic)Identity (basic)Government IDMediumContained

Perkins Coie LLP

bd_96ca5c33927ba673 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 3, 2026

To disclose

—

Affected

1state residents only

Linked

2 filings

Confidence

66%

Full breach record for Perkins Coie LLP →2 incidents on file

Perkins Coie LLP notified Massachusetts residents that an unauthorized third party accessed a single user's account between January 26 and 27, 2026, obtaining files containing personal information including names, contact info, dates of birth, government IDs (SSN, driver's license, passport), financial account numbers, and health-related information. The firm engaged external cybersecurity experts, notified law enforcement, and contained the access. Complimentary credit monitoring and identity restoration services are offered for two years.

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Incident timeline

Jan 26, 2026

Begins

Jun 3, 2026

Filed

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

Indiana State AGbd_5c9b6fead6a0c97b2026-06-03Verified

Name: Perkins Coie LLP
norm: perkins coie
Domain: perkinscoie.com

Name: Perkins Coie LLP
norm: perkins coie
Domain: perkinscoie.com
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Jan 26, 2026 – Jan 27, 2026
Materiality determined: —
Notification sent: Jun 3, 2026
Affected individuals: 1state-resident count only
Data types: Financial accountHealth (basic)Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Initial access: valid_credentials

During the incident: Launched an investigation with the assistance of leading external cybersecurity experts
Reported the issue to law enforcement
Took steps to secure the relevant account and contain the unauthorized access
Changes made: Offered complimentary credit monitoring and identity restoration services for two years
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Indiana State AGJun 3 · first

Massachusetts State AGJun 3 · first · 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.

Source URL: https://www.mass.gov/doc/2026-902-perkins-coie-llp/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 3, 2026
Raw hash: 6baf2f6dcbc1013fd016e97b6045453d9dea06a4abadf66fbc7fed150a69e449

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityPerkins Coie LLP

Victim entityPerkins Coie LLP

IncidentUnauthorized Access

Stated responseLaunched an investigation with the assistance of leading external cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov