The bottom line: Hotel chains must prepare for widespread data breaches and notify guests, while phishing attempts based on stolen data are already documented.
A hotel software service provider operating nationwide has fallen victim to a cyberattack in which personal guest data was compromised. For CISOs, this means elevated risk for hotels and their guests, as well as evidence of a pattern of repeated attacks on hotel infrastructure.
The Data Protection Officer of Mecklenburg-Vorpommern confirmed a cyberattack on a nationwide hotel software service provider following reports from multiple hotels. According to the authorities, complete databases of affected hotel operations were compromised. The captured data includes first and last names, address information, and booking-related details; bank and payment data were not affected according to current knowledge.
The incident pattern suggests a systematic vulnerability in the hotel industry: In February of the same year, a similar attack occurred on another nationwide hotel database service provider resulting in data breaches at multiple hotels. The concentration of attacks within a few months indicates that attackers are deliberately targeting SaaS solutions in the hotel sector – a cross-sector dependency that has a multiplier effect.
Criminals are actively using the stolen data for phishing campaigns. They send fraudulent messages that appear to come from hotel staff to trick recipients into making payments or disclosing further sensitive information. The Data Protection Officer recommended that hotels notify affected guests immediately and warn them of social engineering attacks.
For CISOs in hospitality companies, this incident creates a dual responsibility: on one hand, reviewing and hardening dependencies on their own software service providers; on the other, the necessity to review and execute incident response processes and guest notification procedures. The repeated attacks demonstrate that one-time security measures are insufficient – continuous monitoring and segmentation of guest databases should become standard practice.
Source: www.it-daily.net · Published 30 July 2026
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