Cybersecurity Daily: News & Threats · 29 May 2026 · 5 min

Six Windows Zero-Days, Carnival's 6M Breach & Sandworm Hits NATO

Six Windows zero-days — three actively exploited — expose a coordinated disclosure breakdown between Microsoft and researcher Nightmare-Eclipse, while Carnival Corporation confirms a six-million-record breach and Sandworm deploys Rust-based wipers against NATO-linked infrastructure. Today's briefing covers the stories every security professional needs to know.

Cybersecurity Daily: News & Threats
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Six Windows Zero-Days, Carnival's 6M Breach & Sandworm Hits NATO

Audio is available on Spreaker — see link below.

What's covered

Microsoft Zero-Day Disclosure Crisis

Three Windows zero-days are being actively exploited right now, and three more remain unpatched, all because Microsoft and a security researcher couldn't find a way to talk to each other. That's the situation this morning, and it's worth understanding how it got here.

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Expert Criticism of Microsoft's Response

The industry reaction has been pointed. Katie Moussouris, the bug bounty pioneer who helped build Microsoft's own program, called the handling a dumpster fire.

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Carnival's Six Million Record Breach

Carnival Corporation has formally confirmed a breach affecting just under six million customers. A single phishing email on April fourteenth compromised one employee account.

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Sandworm's Rust Wipers Hit NATO Infrastructure

Russia's Sandworm group has deployed new destructive tooling in Ukraine, a Rust-written wiper called ZeroRays alongside NAUGHTYWIPE. The Rust choice matters.

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FamousSparrow, North Korea Supply Chain, APT Trends

China-aligned FamousSparrow ran an espionage operation against Venezuela's maritime authority in January, almost certainly aimed at monitoring oil shipments. North Korea compromised a widely used code library in a supply-chain attack documented in ESET's latest threat report covering October twenty twenty-five through March twenty twenty-six.

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Michigan Solar Grid Mandate

One regulatory development worth tracking: Michigan's House Bill six zero one one would require solar farm operators to implement NIST and CISA-aligned cybersecurity programs with incident response plans, backed by fines of twenty-five thousand dollars per day for violations. It's an early signal of where energy infrastructure regulation is heading as solar becomes a meaningful share of the grid.

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