What is CVE-2026-77900?

CVE-2026-77900 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Azure App Service Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-77900 cover?

CVE-2026-77900 covers the following CVE IDs: CVE-2026-77900. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-77900?

CVE-2026-77900 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-77900?

CVE-2026-77900 affects 1 product, including: Azure App Service for Linux.

CVE-2026-77900CriticalCVSS 9.8

Azure App Service Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 8, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-77900 →

📋 Description

Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.

🎯 Affected products1

Azure App Service for Linux

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77900