HackingEducationTechnologyEducationCustomer Data InvolvedIdentity (basic)CredentialsLowContained

CHEGG, INC.

bd_555a6f2b78e3057d · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 19, 2018

Filed

Sep 26, 2018

To disclose

7 days

Affected

Not disclosed

Confidence

64%

Full breach record for CHEGG, INC. →3 incidents on file

Chegg, Inc. disclosed that an unauthorized party gained access to a database hosting user data on or around April 29, 2018. The company discovered the incident on September 19, 2018. Affected data may include names, email addresses, shipping addresses, usernames, and hashed passwords. No financial information or SSNs were involved. Chegg engaged a third-party forensics firm and prompted users to change passwords.

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California clockDiscovered Sep 19, 2018 → Notified Sep 19, 20180d ✓ CA 60-day OK7 days discovery → filing

Incident timeline

undetected · 143 days

discovery → filing · 7 days

Apr 29, 2018

Begins

Sep 19, 2018

Discovered

Sep 26, 2018

Filed

vs. sector median

8 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: CHEGG, INC.
norm: chegg
Domain: chegg.com

Name: CHEGG, INC.
norm: chegg
Domain: chegg.com
Industry: EducationllmTechnologyllm

Discovered: Sep 19, 2018
Breach occurred: Apr 29, 2018
Undetected for: 143 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 19, 2018
Affected individuals: Not disclosed
Data types: Identity (basic)Credentials
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External

During the incident: Commenced an investigation supported by a third-party forensics firm
Prompted users to change their Chegg.com password upon login
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 days(7 days from discovery to filing)
Compliance flags: CA 60-day OK · 0d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Sep 19, 2018
→ Notified: Sep 19, 2018
0d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Sep 19, 2018 → Notified: Sep 19, 2018	0d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

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://oag.ca.gov/ecrime/databreach/reports/sb24-140180
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 26, 2018
Raw hash: ed91445560bcecdbfe5c3d1761cf8456212c4173f95ec563909cde8cf795cb87

Reporting entityCHEGG, INC.

Victim entityCHEGG, INC.

Incidentdiscovered Sep 19, 2018

Stated responseCommenced an investigation supported by a third-party forensics firm

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov