What’s Vulnerable › Vulnerabilities

CVE-2021-26430: Azure Sphere Denial of Service Vulnerability

• Severity: low (CVSS 2.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-12 · updated 2026-08-10

Description

Azure Sphere Denial of Service Vulnerability

Affected products

• Microsoft Azure Sphere: before 21.07 — fixed in 21.07
• Microsoft Azure Sphere: from 20.00 before 21.07 — fixed in 21.07

How to fix

Upgrade to a fixed version: Microsoft Azure Sphere 21.07; Microsoft Azure Sphere 21.07. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26430
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26430

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