FEDERALItem 1.05 · mandatoryHackingTelecom & MediaInformationWired TelecomStolen CredentialsData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Multi-Stage ChainMetadataLocationPIILowContained

AT&T INC.

bd_a4373d2af8bc759a · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 19, 2024

Filed

Jul 12, 2024

To disclose

12 weeks

Affected

Not disclosed

Confidence

64%

Full breach record for AT&T INC. →23 incidents on file

AT&T Inc. disclosed that threat actors accessed a third-party cloud workspace between April 14-25, 2024, exfiltrating call and text metadata (logs) for nearly all wireless customers from May 2022 to Jan 2023. The data includes phone numbers, interaction counts, durations, and some cell site IDs, but not call content or PII like SSNs. AT&T contained the access and is cooperating with law enforcement. DOJ approved a delayed disclosure.

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Incident timeline

undetected · 5 days

discovery → filing · 12 weeks / 84 days

Apr 14, 2024

Begins

Apr 19, 2024

Discovered

Jul 12, 2024

Filed

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

Name: AT&T INC.
norm: at t
SEC CIK: 0000732717
Domain: att.com

Name: AT&T INC.
norm: at t
SEC CIK: 0000732717
Domain: att.com
Industry: Telecom & Medianaics map
NAICS 517111 · Wired Telecommunications Carriers

Discovered: Apr 19, 2024
Breach occurred: Apr 14, 2024 – Apr 25, 2024
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: MetadataLocationPII
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 ChannelT1195 Supply Chain Compromise
Threat actor: External
Regulator citations: U.S. Department of Justice determined that a delay in providing public disclosure was warranted
Initial access: supply_chain

During the incident: Activated its incident response process
Retained external cybersecurity experts to assist
Closing off the point of unlawful access
Working with law enforcement in its efforts to arrest those involved
Changes made: Taken additional cybersecurity measures in response to this incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(84 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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 filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/732717/000073271724000046/t-20240506.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Jul 12, 2024
Raw hash: 8ebb2dc7d325c0ba45b274f24c90afe85e8d9b1e8ae6ed026b66ab3f0ec84148

AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.

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Reporting entityAT&T INC.

Victim entityAT&T INC.

Incidentdiscovered Apr 19, 2024

Stated responseActivated its incident response process

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing