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2026-02-27 13:15:45 -

EternalBlue (MS17-010): The Exploit That Powered WannaCry

In 2017, a leaked NSA exploit known as EternalBlue changed cybersecurity forever. Targeting a flaw in Microsoft’s SMBv1 protocol (MS17-010), EternalBlue allowed unauthenticated remote code execution over TCP port 445. An attacker could send a specially crafted SMB packet and gain SYSTEM-level access to a vulnerable Windows machine — no credentials required. The exploit abused improper...

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