UnknownFinancial ServicesFinanceDelayed DiscoveryMedium

Columbia Bank

bd_c71b2e03d88edcf3 · schema v1 · pii pii-v1

Columbia Bank, a finance sector entity reported a theft or mistake incident to the Washington Attorney General. The organization became aware of the incident on 2025-12-19 and filed notice on 2026-04-17. 1,607 Washington residents were affected. 119 days elapsed between awareness and notification. 78 days to identify the breach. 3 days to contain the breach.

Washington clock✗ WA AG >90d17 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

bd_2459fe2d347c53eeOregon State AGfiled 2026-04-17Verified
bd_cbff3120c1de99f8California State AGfiled 2026-04-17Verified

Source provenance

Source URL: https://data.wa.gov/resource/sb4j-ca4h.json?id=23729
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 17, 2026
Raw hash: aacdadbb72ddc3fff37195e7747d20b150a0761096e9583b07d9b9f6c4ca981a

Reporting entity

Name: Columbia Bank
norm: columbia bank

Victim entity

Name: Columbia Bank
norm: columbia bank
Industry: Financial Servicesllm

Incident

Discovered: Dec 19, 2025
Materiality determined: —
Notification sent: —
Affected individuals: 1,607
Data types: —
Attack vector: Unknown
Threat actor: External

Compliance

Time to disclose: 17 weeks(119 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Extraction provenance

Status: No extraction artifact recorded for this disclosure.