2026 STMicroelectronics — TheGentlemen leak-site claim; ~16k users alleged (unverified)
Data compromised
Actor claim (unverified, per ransomware trackers): ~30 employees, ~15,954 users, ~254 third-party credentials, ~134 external assets. Distinct from ST’s confirmed Sep 2025 external IT-support platform incident. Company confirmation of this 2026 TheGentlemen listing not located.
Technical writeup
Unverified leak-site / extortion claim — TheGentlemen listing for STMicroelectronics indexed ~September 26, 2026 (ransomware.live / trackers; est. attack Sep 21). Actor figures cited in secondary coverage include ~30 employees, ~15,954 users, ~254 third-party credentials. ST confirmation of this listing not located. Catalog separately from the company’s confirmed September 2025 external support-platform incident (email/postal/phone). recordsAffected 15954 (unverified actor user count); companyConfirmed false. Do not use Breachsense as a source.
Root cause
Unverified TheGentlemen ransomware/extortion leak-site listing (discovered ~Sep 26, 2026; est. attack ~Sep 21)