# AI security threats escalate in defense sector From fake job listings to ransomware attacks, cyber dangers are on the rise. - **Source:** [CyberWire Daily](https://brifing.si/source/08fbf94c-e51b-42cb-be13-84db10e5d993) - **Published:** 2026-07-21 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/def51bc9-7d53-405e-83f6-776ab4f0324c ## AI risks in defense and healthcare The US military's AI token consumption and healthcare ransomware cases expose critical infrastructure vulnerabilities. Health-ISAC reports reveal healthcare organizations' unpreparedness against cyber threats. ## North Korea's Web3 trap Operation ClickFake targets crypto professionals with fake job postings. This phishing campaign represents a sophisticated example of digital asset theft tactics. ## Microsoft 365 calendar exploit HollowGraph malware turns corporate calendar systems into command centers. This method creates a new attack vector by bypassing traditional security measures. ## Hidden automotive vulnerability A device in millions of US vehicles allows hackers to paralyze systems. Despite manufacturers' urgent patches, many users remain unaware of the risk. ## Romania's digital registry wiped Cyber attackers erased Romania's entire land registry. This assault on critical government databases exposes national infrastructure fragility. ## Shadow AI's regulation dilemma Unauthorized AI tools disrupt cyber risk disclosure processes. Unmonitored AI usage brings data breach and compliance challenges. ## Sources covering this story - https://www.thecyberwire.com/podcasts/daily-podcast/2597/notes — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._