Hewlett Packard Enterprise
Disclosed Jan 24, 20242 years agoConfirmed
Midnight Blizzard exfiltrated data from HPE cloud email mailboxes
HPE was notified on December 12, 2023 that the Russian state group Midnight Blizzard had accessed its cloud-based email environment and exfiltrated data from a small percentage of mailboxes starting in May 2023. The company linked it to earlier theft of SharePoint files by the same actor.
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Jan 24, 2024 |
| Discovered | Dec 12, 2023 |
| Attack | Hacking |
| Data exposed | Emails, Messages, Internal documents |
| Sector | Tech · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Hewlett Packard Enterprise Co Form 8-K, Item 1.05 (2024-01-24)sec.gov · SEC filing | SEC filing |
| HPE says it was hacked by Russian group behind Microsoft email breachtechcrunch.com · News | News |
Notices filed
History of this record
- 2026-09-25 · attack: unknown to hacking · seed source
- 2026-09-25 · data_types: [] to ["emails","messages","internal-docs"] · seed source
- 2026-09-25 · discovered: empty to 2023-12-12 · seed source
- 2026-09-25 · summary: empty to HPE was notified on December 12, 2023 that the Russian state group Midnight Blizzard had accessed its cloud-based email environment and exfiltrated data from a small percentage of mailboxes starting in May 2023. The company linked it to ear · seed source
- 2026-09-25 · title: Material cybersecurity incident reported to the SEC (8-K Item 1.05) to Midnight Blizzard exfiltrated data from HPE cloud email mailboxes · seed source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (SEC 8-K), confirmed by SEC 8-K. Record counts are as reported. Not legal advice.