HackingHealthcareTechnologyHealthcareStolen CredentialsTargetedIdentity (basic)Government IDFinancial accountHealth (basic)MediumContained

Jounce Therapeutics, Inc.

bd_16283173388a9c57 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 22, 2021

Filed

Apr 5, 2021

To disclose

6 weeks

Affected

4state residents only

Linked

3 filings

Confidence

67%

Full breach record for Jounce Therapeutics, Inc. →

Jounce Therapeutics, Inc. notified the NH AG of a security incident discovered on Feb 22, 2021, where an employee's Office 365 mailbox was accessed by an unauthorized actor. The incident affected approx. 4 NH residents, exposing PII including SSNs, financial account numbers, and health plan info. Jounce engaged forensic investigators, disabled legacy email protocols, and mandated MFA.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 6 weeks / 42 days

Feb 22, 2021

Discovered

Apr 5, 2021

Filed

vs. sector median

7 wks faster

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

Indiana State AGbd_5463beea5a97a8f22021-04-02 · +3dVerified
Massachusetts State AGbd_55ea5ed4c81696c22021-04-02 · +3dVerified

Name: Jounce
norm: jounce
Domain: jounce.ai

Name: Jounce Therapeutics, Inc.
norm: jounce therapeutics
Domain: jouncetx.com
Industry: HealthcarellmTechnologyllm

Discovered: Feb 22, 2021
Materiality determined: —
Notification sent: Apr 2, 2021
Affected individuals: 4state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Engaged a cybersecurity and forensic firm
Offering a complimentary two year membership of Experian’s IdentityWorks
Changes made: Disabling the ability to access email through legacy log in protocols
Requiring all employees to use multi-factor authentication
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(42 days from discovery to filing)
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 ↗

Indiana State AGApr 2 · first

Massachusetts State AGApr 2 · first

New Hampshire State AG+3d · 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/jounce-therapeutics-20210405.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 5, 2021
Raw hash: 82cd3a9fe5bd6d8769de9ce48cb1e1a89e9f6f48f6e96d38aa686a60b8199db2

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityJounce

Victim entityJounce Therapeutics, Inc.

Incidentdiscovered Feb 22, 2021

Stated responseEngaged a cybersecurity and forensic firm

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov