MAINSTREET FEDERAL CREDIT UNION
ent_019eeff2b8732c8c36388312a390bacd
Disclosures
3
State AG · 3 jurisdictions
Incidents
1
filings grouped by incident
Max affected reported
4,123
nationwide · State AG IN
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- MAINSTREET FEDERAL CREDIT UNION
- Normalized
- mainstreet federal credit union— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- 549300UFWBQTD1W41E26
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- None on record
Disclosure history (3)newest first
- ⛰️New Hampshire State AGas victim2026-06-18
Mainstreet Credit Union notified the NH Attorney General of a cybersecurity event affecting one NH resident. An unauthorized actor accessed an employee's email account between Jan 12-20, 2026, likely via phishing. The actor accessed one resident's name and financial account number. MCU secured the account, engaged forensic investigators, and mailed notification on June 18, 2026.
- 🏛️Massachusetts State AGas victim2026-06-01
Mainstreet Federal Credit Union notified Massachusetts residents of a data security incident involving unauthorized access to customer information, likely via a phishing attack targeting the credit union's email environment. The incident compromised personal data, and the credit union has enhanced its email security measures.
- 🏎️Indiana State AGas victim2026-05-04
Mainstreet Credit Union reported a data breach to the Indiana Attorney General. The breach occurred on 2026-01-12 and was reported on 2026-05-04. 1 Indiana residents were affected. 4,123 individuals affected in total.