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Coordinated “cyberattack” on Minnesota water utilities: What you need to know

CVE-2021-22681

July 29, 2026 · Tenable Blog · Severity: CRITICAL

A coordinated cyber attack disrupted water systems across more than 30 Minnesota communities.

Key Takeaways

  • A coordinated cyber attack disrupted water systems across more than 30 Minnesota communities.
  • Here is what defenders need to know about the attack so far.
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