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Data breach

Breach at Cisco Duo authentication provider leaks SMS authentication logs

First reported · Last reported · 2 related reports

Cisco Duo's North American telephony and SMS authentication provider was breached through an employee account compromised by phishing. The attacker downloaded authentication message logs containing some customers' phone numbers, carriers, locations and times. The provider said message contents were not accessed, and Cisco Duo disclosed the leak.

Key facts

Affected organisation
Cisco
Incident type
Data breach
Occurred / detected
Not confirmed
Scale of damage
Authentication message logs of some customers, including phone numbers, carriers, locations and times
Cause / method
Breach via a provider employee account compromised by phishing
Location
United States

If your data was exposed

Exposed dataPhone number

  1. Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.

Timeline

  1. Cisco Duo disclosed that a breach at its North American telephony and SMS authentication provider had leaked some customers' authentication message logs.

2 related reports

The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.