HackingTelecom & MediaInformationVulnerability ExploitStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedCredentialsIdentity (basic)Government IDAuthenticationMediumContained

COMCAST CABLE COMMUNICATIONS, LLC

bd_3823dc42ff458d5a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 16, 2023

Filed

Dec 18, 2023

To disclose

9 weeks

Affected

Not disclosed

Linked

8 filings

Confidence

66%

Full breach record for COMCAST CABLE COMMUNICATIONS, LLC →5 incidents on file

Comcast Cable Communications (Xfinity) disclosed unauthorized access to internal systems between October 16-19, 2023, resulting from a vulnerability in Citrix software. The attacker likely acquired usernames, hashed passwords, and for some customers, names, contact info, last four digits of SSN, DOB, and secret questions/answers. Systems were patched, law enforcement notified, and customers prompted to reset passwords and enable MFA.

J jump to incidentP pin to compareR raw source

Vermont clock⏱ VT AG >14 bday9 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 9 weeks / 63 days

Oct 16, 2023

Begins

Oct 16, 2023

Discovered

Dec 18, 2023

Filed

This filing is one of 8 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

California State AGbd_9483a5f6ebb2a4932023-12-18Verified
Washington State AGbd_cf68c61c04a06b882023-12-18Candidate
Maine State AGbd_d0e6f01e879a45062023-12-18Verified
Oregon State AGbd_e1e3e7f42684ebc92023-12-18Verified

Show 3 more filings ↓up to 39d gap

Indiana State AGbd_62f3f759d84e3a662024-01-26 · +39dVerified
Massachusetts State AGbd_7804b41a61024f392024-01-26 · +39dVerified
Maine State AGbd_7ffaf039f7f863fd2024-01-26 · +39dVerified by operator

Name: COMCAST CABLE COMMUNICATIONS, LLC
norm: comcast cable communications
Domain: xfinity.com

Name: COMCAST CABLE COMMUNICATIONS, LLC
norm: comcast cable communications
Domain: xfinity.com
Industry: Telecom & Mediallm

Discovered: Oct 16, 2023
Breach occurred: Oct 16, 2023 – Oct 19, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 18, 2023
Affected individuals: Not disclosed
Data types: CredentialsIdentity (basic)Government IDAuthentication
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified federal law enforcement
Third party: via Citrix
Initial access: exploit_public_facing

During the incident: Promptly patched and mitigated our systems
Notified federal law enforcement
Conducted an investigation into the nature and scope of the incident
Proactively asked customers to reset their password
Changes made: Encouraged customers to enroll in two-factor or multi-factor authentication
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(63 days from discovery to filing)
Compliance flags: VT AG >14 bday
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 7 states

View merged incident ↗

California State AGDec 18 · first

Washington State AGDec 18 · first

Maine State AGDec 18 · first

Oregon State AGDec 18 · first

Vermont State AGDec 18 · first · this page

Indiana State AG+39d

Massachusetts State AG+39d

Maine State AG+39d

Pattern: first filing Dec 18 (CA), last Jan 26 (ME) — a 39-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://ago.vermont.gov/document/2023-12-18-comcast-cable-communications-xfinity-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 18, 2023
Raw hash: 7ac50511fc059d68006fe3276bea4fd4ecf8115a2320e891a807cb4fd004f670

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityCOMCAST CABLE COMMUNICATIONS, LLC

Victim entityCOMCAST CABLE COMMUNICATIONS, LLC

Incidentdiscovered Oct 16, 2023

Stated responsePromptly patched and mitigated our systems

ComplianceVT AG >14 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov