DisclosureLens
HackingInformationCustomer Data InvolvedPIILow

US Cellular

bd_02c3b6e497fd88aa · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 23, 2020

Filed

Oct 1, 2020

To disclose

8 days

Affected · nationwide

781 in this filing

Confidence

50%
Full breach record for US Cellular →3 incidents on file

US Cellular reported a data breach to the Maine Attorney General, stating that an external system breach (hacking) occurred on September 18, 2020. The breach was discovered on September 23, 2020, and affected one Maine resident. Notification to the affected individual was sent on October 3, 2020. The type of data compromised was not specified in the notice.

Maine clockDiscovered Sep 23, 2020 → Filed with AG Oct 1, 20208d ✓ ME AG ≤30d8 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 · 5 days
discovery → filing · 8 days

Sep 18, 2020

Begins

Sep 23, 2020

Discovered

Oct 1, 2020

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed78 affectedView incident

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.