Summary
Impact: Spoofing. Microsoft rating: Critical. Not known to be exploited. Customer action: Not required.
Details
Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.
Vulnerabilities 1
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High 7.7
Azure Event Grid Spoofing Vulnerability
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
Revision history
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#1
Information published.
References
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CVE-2026-83947 Azure Event Grid Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83947
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss