THREAT OPS › Threat News › [Breach] Hallmark — 1,736,520 accounts exposed
[Breach] Hallmark — 1,736,520 accounts exposed
Breached service: Hallmark Domain: hallmark.com Accounts exposed: 1,736,520 Breach date: 2026-03-31 Added to HIBP: 2026-04-12T02:01:11Z Data classes leaked: Email addresses, Names, Phone numbers, Physical addresses, Support tickets Description: In March 2026, Hallmark suffered an alleged breach and subsequent extortion after attackers gained access to data stored within Salesforce. The data was la
MITRE ATT&CK techniques
- Email AddressesT1589.002
Indicators of compromise
- hallmark.comdomain
Original source: https://haveibeenpwned.com/PwnedWebsites#Hallmark