Manpower Suffers Ransomware Attack by RansomHub, Affecting 144,189 Individuals
Global staffing and workforce solutions firm Manpower (a brand of ManpowerGroup) experienced a ransomware attack by the RansomHub group, with unauthorized access to its network occurring between December 29, 2024, and January 12, 2025. The incident potentially led to the acquisition of sensitive personal information belonging to approximately 144,189 individuals. The stolen data reportedly includes passport scans, Social Security Numbers (SSNs), government-issued IDs, addresses, contact details, medical test results, financial statements, HR data analytics, and confidential contracts.
Signal context
First seen: Dec 29, 2024
Last updated: Jul 1, 2026
Status: Public signal
Key points
- Ransomware attack by RansomHub group.
- Unauthorized access occurred between December 29, 2024, and January 12, 2025.
- Approximately 144,189 individuals affected.
Signal analysis
BetaThis 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.
Sector: Finance and Insurance
Likely country: Location not provided
Watch ransomware, endpoint compromise and business interruption exposure.
- Source type: outside the affected organization
Impact area: Availability
- 22 signals in the same sector
- 26 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Manpower data breach impacted 144,180 individuals - Security Affairshttps://securityaffairs.com/181122/cyber-crime/manpower-data-breach-impacted-144180-individuals.htmlPublic source from securityaffairs.com.
Manpower Says Data Breach Stemming From Ransomware Attack Impacts 140000https://www.securityweek.com/manpower-says-data-breach-stemming-from-ransomware-attack-impacts-140000/Public source from securityweek.com.
Manpower Discloses Data Breach Impacting Nearly 145,000 People after Ransomware Attack - CPO Magazinehttps://www.cpomagazine.com/cyber-security/manpower-discloses-data-breach-impacting-nearly-145000-people-after-ransomware-attack/Public source from cpomagazine.com.
RansomHub Hits ManpowerGroup in Massive Data Breach - Ampcus Cyberhttps://www.ampcuscyber.com/shadowopsintel/ransomhub-compromised-manpowergroup/Public source from ampcuscyber.com.
Related signals
Grouped by why the signal is relevant.
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Aflac Life Insurance Japan disclosed unauthorized access to its systems between June 15 and June 25, 2026. The breach affected files containing policy details, personal information, and bank account information of approximately 4.38 million customers. The company has suspended affected systems and is investigating the incident with third-party cybersecurity experts.