---
schema_version: "secwatch.filing_event.v1"
accession: "0000034782-23-000104"
form_type: "8-K"
ticker: "SRCE"
cik: "0000034782"
company_name: "1ST SOURCE CORP"
filed_at: "2023-07-10T23:59:59+00:00"
generated_at: "2026-06-13T10:46:25.996348+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# 1st Source Bank discloses MOVEit data breach; unauthorized access to client PII

## Summary
- Vendor Progress Software disclosed MOVEit vulnerability on May 31, 2023; 1st Source uses it.
- Unauthorized third party gained access to sensitive client data including PII.
- Company patched, hardened server, launched investigation with external forensic experts.
- No impact on other systems or business operations; vulnerability contained.
- Notifying impacted individuals with credit monitoring; does not expect material adverse effect.

## SEC filing metadata
- accession: 0000034782-23-000104
- form_type: 8-K
- ticker: SRCE
- cik: 0000034782
- company_name: 1ST SOURCE CORP
- filed_at: 2023-07-10T23:59:59+00:00
- event_type: cyber
- sentiment: negative
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/34782/000003478223000104/0000034782-23-000104-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/34782/000003478223000104/source-20230710.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000034782-23-000104
- JSON: https://secwatch.observer/filing/0000034782-23-000104.json
- Plain text: https://secwatch.observer/filing/0000034782-23-000104.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.