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House of Commons employee data breach

Disclosed
August 14, 2025
Sector
Government
Province or territory
Across Canada
People affected Not disclosed
Data exposed
Employees' names, job titles, office locations and e-mail addresses, and information about House-managed computers and mobile devices, taken through a recently disclosed Microsoft vulnerability. The Communications Security Establishment helped the House respond. The number of people affected was not disclosed.
Cause
Unpatched vulnerability
Status
Confirmed
Sources