Microsoft security advisory (AV26-377)

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        <div><p><strong>Serial number: </strong>AV26-377<br /><strong>Date: </strong>April&nbsp;22, 2026</p>

On April 21, 2026, Microsoft published an out-of-band (OOB) security update to address a critical vulnerability in the following product:

  • .NET 10.0.0 – versions 10.0.0 to 10.0.6

The Cyber Centre encourages users and administrators to review the web links provided and apply the necessary update.

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Article Link: https://cyber.gc.ca/en/alerts-advisories/microsoft-security-advisory-av26-377