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These 17,000 unpatched Microsoft Exchange servers are a ticking time bomb

ID: b6445a81-64a7-59e3-ba61-ef575b86e96f

STIX ID: report--b6445a81-64a7-59e3-ba61-ef575b86e96f

Feed Name: The Register (Security)

Threat Score
75/100

Date Published: 2024-03-28

Date Updated: 2026-04-26

Author: Iain Thomson

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The German BSI warns that roughly 17,000+ public-facing Microsoft Exchange servers in Germany—about 37% of installations—are vulnerable due to unsupported versions or missing critical patches (notably CVE-2024-21410). BSI is urging rapid patching, emailing providers daily, and highlights the elevated risk from criminal actors and nation-state activity (Cozy Bear) targeting politicians and other high-risk sectors.

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