HackingProfessional ServicesProfessional ServicesStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

SIMON & SCHUSTER, LLC

bd_650a17aadfa94104 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Aug 10, 2026

To disclose

—

Affected

4state residents only

Linked

3 filings

Confidence

66%

Full breach record for SIMON & SCHUSTER, LLC →

Simon & Schuster notified the NH Attorney General of a security incident at a third-party escheatment vendor. An employee email account was accessed by an unauthorized third party between April 29, 2026, and June 16, 2026. The incident affected 4 New Hampshire residents, whose name, address, and Social Security numbers were potentially exposed. Simon & Schuster launched an investigation, notified law enforcement, and is providing 24 months of identity monitoring to affected individuals.

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Incident timeline

Apr 29, 2026

Begins

Aug 10, 2026

Filed

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Vermont State AGbd_34621714a0f4c2b82026-08-10Candidate
Massachusetts State AGbd_5086a97446b110102026-08-10Verified

Name: SIMON & SCHUSTER, LLC
norm: simon schuster
Domain: simonandschusterpublishing.com

Name: SIMON & SCHUSTER, LLC
norm: simon schuster
Domain: simonandschusterpublishing.com
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Apr 29, 2026 – Jun 16, 2026
Materiality determined: —
Notification sent: Aug 10, 2026
Affected individuals: 4state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Third party: via Escheatment services vendor
Initial access: valid_credentials

During the incident: Launched an investigation to determine whether impacted emails contained personal information
Notified law enforcement
Providing individuals with 24 months of complimentary identity monitoring services through Epiq Privacy Solutions ID
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 · 3 filings · 3 states

View merged incident ↗

Vermont State AGAug 10 · first

Massachusetts State AGAug 10 · first

New Hampshire State AGAug 10 · 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://mm.nh.gov/files/uploads/doj/remote-docs/simon-schuster-20260810.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 10, 2026
Raw hash: 6354ec2c3dcdc373aa928e86a8f9478528af2561301aafaf8f78bcc5d5af4a11

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entitySIMON & SCHUSTER, LLC

Victim entitySIMON & SCHUSTER, LLC

IncidentThird-Party / Supply Chain

Stated responseLaunched an investigation to determine whether impacted emails contained personal information

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov