DisclosureLens
GLOBALMalwareFinancial ServicesFinanceRansomwareCl0pRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

COLUMBIABANK.COM

bd_86267166ea80831c · schema v1 · pii pii-v2

Severity

High

Discovered

—

Filed

Sep 23, 2026

To disclose

—

Affected

Not disclosed

Confidence

50%
Full breach record for COLUMBIABANK.COM →

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Cl0p on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.

Group activity: Financial ServicesDiscovered: 2026-09-23
View aggregator listing on ransomware.live

Source: Ransomware.live

Company description · AI-generated by the aggregator, not the leak post

Columbia Banking System, operating under the domains columbiabank.com and umpquabank.com, is a U.S.-based financial holding company headquartered in Tacoma, Washington. Following its merger with Umpqua Holdings, it operates as Umpqua Bank, providing retail banking, commercial banking, lending, wealth management, and financial services to individuals and businesses primarily across the western United States, including Washington, Oregon, California, Idaho, and Nevada.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Sep 23, 2026

Claim posted

—

No filing yet · watching

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

Claim → filing

—

Compliance clock

Not assessable

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

Evidence ladder

Leak-site claimThis record

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 statement

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

No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.

Source ceiling

  • actor name
  • victim claim
  • ransom/leak status
  • discovery date
  • materiality
  • notification
  • affected count
  • confirmed data types
  • compliance clock

The ✕ fields stay blank until a regulatory filing or victim disclosure lands.