HPE Notifies Employees of Data Breach Following Russian Office 365 Hack
Hewlett Packard Enterprise (HPE) began notifying employees on January 29, 2025, about a data breach.
Key points
- HPE began notifying affected employees on January 29, 2025.
- Russian state-sponsored hackers (Midnight Blizzard/Cozy Bear) were responsible.
- Unauthorized access to HPE's Office 365 email environment occurred in May 2023.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Jan 29, 2025
- Updated
- Jul 1, 2026
- Confidence
- High
- Evidence
- 3 sources
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: possible insider or internal misuse
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data, Server or cloud data store
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Hewlett Packard Enterprise (HPE) began notifying employees on January 29, 2025, about a data breach. Russian state-sponsored hackers (Midnight Blizzard, also known as Cozy Bear) gained unauthorized access to HPE's cloud-based Office 365 email environment in May 2023. The attackers exfiltrated data, including driver's licenses, credit card numbers, and Social Security numbers, from a small percentage of employee mailboxes, particularly those in cybersecurity, go-to-market, and business segments.
When was this signal reported?
Shadow Tier lists Jan 29, 2025 as the signal date.
Which organization is connected to this signal?
Hpe is the organization connected to this public signal.
Explore HpeWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
Explore data exposure and breach intelligenceRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
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Related context
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