HackingInformationVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedEmployee Data InvolvedIdentity (basic)Government IDHigh

Halma plc

bd_de423852a76ad2a4 · schema v1 · pii pii-v1

Severity

High

Discovered

Jun 8, 2023

Filed

Jul 7, 2023

To disclose

29 days

Affected · nationwide

7,1055 in this filing

Linked

2 filings

Confidence

65%

Full breach record for Halma plc →3 incidents on file

Halma plc reported a data breach impacting 7,105 individuals due to a third-party vendor vulnerability. The incident occurred on May 27, 2023, and was discovered on June 8, 2023. The compromised data includes names and Social Security numbers. Affected individuals were notified on June 23, 2023, and offered 24 months of credit monitoring and identity restoration services from Experian.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Jun 8, 2023 → Filed with AG Jul 7, 202329d ✓ ME AG ≤30d29 days discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 12 days

discovery → filing · 29 days

May 27, 2023

Begins

Jun 8, 2023

Discovered

Jul 7, 2023

Filed

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

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

New Hampshire State AGbd_460219805d057b652023-06-21 · +16dVerified

Name: Halma plc
norm: halma
Domain: halma.com

Name: Halma plc
norm: halma
Domain: halma.com

Discovered: Jun 8, 2023
Breach occurred: May 27, 2023
Undetected for: 12 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 23, 2023
Affected individuals: 7,105state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing Application
Threat actor: External
Initial access: supply_chain

During the incident: Notified affected individuals via electronic communication.
Offered 24 months of credit monitoring, identity restoration, and identity theft insurance through Experian.
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 days(29 days from discovery to filing)
Compliance flags: ME AG ≤30d · 29d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Jun 8, 2023
→ Filed with AG: Jul 7, 2023
29d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Jun 8, 2023 → Filed with AG: Jul 7, 2023	29d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

New Hampshire State AGJun 21 · first

Maine State AG+16d · this page

Pattern: first filing Jun 21 (NH), last Jul 7 (ME) — a 16-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.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/f2162e3a-ea13-488f-b11f-55d71941ffd8.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 7, 2023
Raw hash: b239ebb7f19c5b578f0ac2b7f18554133eaca89c51b35d5bd7176781ae751cfc

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityHalma plc

Victim entityHalma plc

Incidentdiscovered Jun 8, 2023

Stated responseNotified affected individuals via electronic communication.

ComplianceME AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov