Cisco Data Breach via Vishing Attack on Third-Party CRM
Cisco confirmed a data breach following a voice phishing (vishing) attack that tricked an employee and led to unauthorized access to a third-party cloud-based CRM system. The attacker stole basic profile information of users registered on Cisco.com, including names, email addresses, phone numbers, user IDs, and organization details. No sensitive data, passwords, or confidential customer information was compromised.
Signal context
First seen: Aug 8, 2025
Last updated: Jun 26, 2026
Status: Public signal
Key points
- Breach caused by a vishing attack targeting an employee.
- Unauthorized access gained to a third-party cloud-based CRM system.
- Stolen data includes names, email addresses, phone numbers, user IDs, and organization details.
Signal analysis
BetaIt helps compare this signal with other published signals without treating the labels as final determinations.
Likely country: Location not provided
The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.
- Source type: outside the affected organization
- Source type: possible insider or internal misuse
Impact area: Confidentiality
Likely asset: User or customer data, Server or cloud data store
- 1 signal in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
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