FEDERALHackingTechnologyFinancial ServicesInformationVulnerability ExploitStolen CredentialsData ExfiltratedData EncryptedCustomer Data InvolvedDelayed DiscoveryMulti-Stage ChainRansom DemandedPIIIdentity (basic)Government IDIP / systemMediumResolved

EQUIFAX INC.

bd_e4ad2c4cce455cfc · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Feb 19, 2026

To disclose

—

Affected

Not disclosed

Confidence

66%

Full breach record for EQUIFAX INC. →12 incidents on file

Equifax disclosed a 2017 cybersecurity incident involving unauthorized access to its systems, resulting in the theft of personal information (PII, identity, IP) from consumers in the US, Canada, and UK. The attack exploited a public-facing application, leading to data exfiltration and encryption (ransomware). The incident was resolved, and the company implemented enhanced security controls, including MFA and employee training.

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Incident timeline — partial

? — ?

Breach window unknown

Feb 19, 2026

Filed

—

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Tracked as a single-filing incident — the only disclosure on record for this event so far.No incident reportedView incident

Name: EQUIFAX INC.
norm: equifax
SEC CIK: 0000832463
Domain: equifax.com

Name: EQUIFAX INC.
norm: equifax
SEC CIK: 0000832463
Domain: equifax.com
Industry: TechnologyllmFinancial Servicesllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)Government IDIP / system
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified HHSState AG investigation opened
Initial access: exploit_public_facing

During the incident: Engaged forensic investigators
Notified law enforcement
Sent notification letters to affected individuals
Provided credit monitoring services
Changes made: Implemented multi-factor authentication (MFA)
Enhanced security awareness training
Deployed additional security controls
Updated firewall / network access rules
Patched affected systems / applied security updates
Reviewed and strengthened access controls
Enhanced encryption of sensitive data
Improved backup and recovery procedures
Conducted comprehensive security assessment
Updated incident response procedures
Source: Quoted from the filing itself, not independently verified.

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/33185/000003318526000010/efx-20251231.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Feb 19, 2026
Raw hash: 7279768c75f5a62508da261db27a6cd441fc81d04bacb42a0a0fa55144bc255c

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Reporting entityEQUIFAX INC.

Victim entityEQUIFAX INC.

IncidentUnauthorized Access

Stated responseEngaged forensic investigators

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing