Vulnerability in Microsoft Azure Event Grid System

[ Description ]Official description

Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL13 Oct 2026NCSC-2026-0421

  Vulnerabilities fixed in Microsoft Azure Translated from Dutch

  Probability/damage M/HCVE-2026-85922CVE-2026-85925CVE-2026-88132+9 more CVEs
• BSI CERT-Bund8 Oct 2026WID-SEC-2026-3834

  Microsoft Azure: Multiple vulnerabilities Translated from German

  CVE-2026-77900CVE-2026-83943CVE-2026-69435+1 more CVEs

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83947Vendor Advisory