HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHighContained

Carlson Building Maintenance

bd_78b1fe1d363284d5 · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Apr 3, 2026

To disclose

—

Affected

1,118state residents only

Linked

4 records

Confidence

67%

Full breach record for Carlson Building Maintenance →3 incidents on file

Carlson Building Maintenance Inc. notified Iowa AG of a cyber incident where an unauthorized actor accessed its network on September 22, 2025. The breach affected 1,118 Iowa residents, exposing names, Social Security numbers, and dates of birth. Carlson engaged forensic specialists, notified law enforcement, and is offering 12 months of credit monitoring.

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Leak gap clock⏱ Leak >90d

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline

Sep 22, 2025

Begins

Apr 3, 2026

Filed

This filing is one of 4 records about the same incident.View merged incident

A leak claim by akira about this victim was first seen 175 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteakirabd_61f0e01a67c879002025-10-10 · +175dVerified by operator

Regulatory filings (2) · sorted by filing gap

Indiana State AGbd_fc8191c8d7334d462026-04-03Verified
Illinois State AGbd_b43cbbe24597fad42026-04-01 · +2dVerified by operator

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Carlson Building Maintenance
norm: carlson building maintenance
Domain: carlsonbuildin.com
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Sep 22, 2025
Materiality determined: —
Notification sent: Apr 3, 2026
Affected individuals: 1,118state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified federal law enforcementProviding written notice to relevant state regulators
Initial access: valid_credentials

During the incident: Moved to investigate and respond to the incident
Assessed the security of Carlson systems
Identified potentially affected individuals
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months, through TransUnion
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state regulators
Providing written notice to the three major credit reporting agencies
Changes made: Implementing additional safeguards and training to its employees
Implementing additional technical security measures to strengthen the security of its systems
Reviewing and enhancing data privacy policies and procedures
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >90dIA AG ≤5 bday
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Illinois State AGApr 1 · first

Indiana State AG+2d

Iowa State AG+2d · 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.iowaattorneygeneral.gov/media/cms/432026_Carlson_Building_Maintenance_117100753A4C4.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 3, 2026
Raw hash: 2ba69dcbfab70c708a45e48c5d0bfe33da6efc9c7d0a8cd56051750b54a89e6c

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityCarlson Building Maintenance

IncidentUnauthorized Access

Stated responseMoved to investigate and respond to the incident

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancewww.iowaattorneygeneral.gov