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Vulnerabilities

Vulnerability · CVE-2026-83947

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

Published Oct 8, 2026 · catalog updated Oct 15, 2026 · azure event grid

Check if you run it

No confirmed exploitation is on record for CVE-2026-83947. EPSS is 0.36%. Act only if a listed version of azure event grid is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.36%
Remediation
Advisory link
Affected products
cpe microsoft/azure event grid

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/azure event gridversion unspecified

How to fix CVE-2026-83947

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-83947. EPSS is 0.36%. Act only if a listed version of azure event grid is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 0.36%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · NCSC Netherlands

    Detected

    Microsoft heeft kwetsbaarheden verholpen in diverse Azure componenten, zoals Key Vault, DevOps, API center en Storage. Een kwaadwillende kan de kwetsbaarheden misbruiken om beveiligingsmaatregelen te omzeilen, zich verhoogde rechten toe te kennen, willekeurige code uit te voeren en toegang te krijgen tot gevoelige gegevens. De kwetsbaarheden met kenmerk CVE-2026-83943, CVE-2026-96207, CVE-2026-694

  2. Oct 15, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2026-83947

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-83947

    30-day exploitation probability 0.4%

    first.org
  • NCSC NetherlandsGovernment advisoryCVE-2026-83947

    Microsoft heeft kwetsbaarheden verholpen in diverse Azure componenten, zoals Key Vault, DevOps, API center en Storage. Een kwaadwillende kan de kwetsbaarheden misbruiken om beveiligingsmaatregelen te omzeilen, zich verhoogde rechten toe te kennen, willekeurige code uit te voeren

    advisories.ncsc.nl
  • NIST NVDVulnerability recordCVE-2026-83947

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.