LexisNexis Legal & Professional data breach by FulcrumSec
The FulcrumSec cybercrime group claimed responsibility for breaching LexisNexis Legal & Professional's Amazon Web Services (AWS) cloud infrastructure by exploiting an unpatched React2Shell vulnerability. They claimed to have stolen 2.04 GB of data, including 3.9 million database records, approximately 400,000 cloud user profiles (names, emails, phones, job roles), 21,042 enterprise customer accounts, 53 plaintext AWS Secrets Manager secrets, and 45 employee password hashes. LexisNexis confirmed unauthorized access to a limited number of servers containing mostly legacy, deprecated data from prior to 2020, including customer names, user IDs, business contact information, products used, customer surveys with respondent IP addresses, and support tickets. The company stated no Social Security numbers, financial information, or active passwords were compromised and that the incident was contained.
Signal context
First seen: Mar 11, 2026
Last updated: Jun 26, 2026
Status: Public signal
Key points
- Attacker: FulcrumSec cybercrime group.
- Method: Exploited unpatched React2Shell vulnerability in AWS cloud infrastructure.
- Impact: 2.04 GB of data stolen, including 3.9 million database records and 400,000 user profiles.
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
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
- 21 signals in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
New LexisNexis Data Breach Confirmed After Hackers Leak Files - SecurityWeekhttps://www.securityweek.com/new-lexisnexis-data-breach-confirmed-after-hackers-leak-files/Public source from securityweek.com.
LexisNexis Data Breach: Threat Actor Claims Theft of 2.04 GB of Data - Cyber Presshttps://cyberpress.news/lexisnexis-data-breach-threat-actor-claims-theft-of-2-04-gb-of-data/Public source from cyberpress.news.
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