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Update: UK Hospitals among Victims of Massive Ransomware Attack

ID: 07ec71b2-96d7-548f-ad5a-e00cb4d0bc7e

STIX ID: report--07ec71b2-96d7-548f-ad5a-e00cb4d0bc7e

Feed Name: Security Ledger

Threat Score
85/100

Date Published: 2017-05-12

Date Updated: 2026-04-26

Author: Paul Roberts

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The report describes the global May 2017 Wanna/Wana (WannaCry) ransomware outbreak that abused the EternalBlue SMBv1 vulnerability (MS17-010) to self-propagate as a worm, infecting systems in 74 countries (roughly 45,000 incidents) and causing major operational disruptions—most notably forcing UK NHS hospitals to divert patients—while Microsoft had already issued a patch that many organizations had not applied.

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