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CVE-2026-77900— Azure App Service Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Azure App Service for Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Azure App Service 中，关键函数缺少身份验证功能，导致未授权的攻击者能够通过网络执行代码。

CVSS 9.8 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-77900

Vulnerability Information
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Vulnerability Title
Azure App Service Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Azure App Service for Linux - -

II. Public POCs for CVE-2026-77900

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III. Intelligence Information for CVE-2026-77900

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Other References for CVE-2026-77900 (1)

Same Patch Batch · Microsoft · 2026-10-08 · 7 CVEs total

CVE-2026-96207 10.0 CRITICAL Microsoft Partner Center Elevation of Privilege Vulnerability
CVE-2026-94510 9.9 CRITICAL Microsoft Bookings Elevation of Privilege Vulnerability
CVE-2026-88131 9.8 CRITICAL Microsoft Dataverse Remote Code Execution Vulnerability
CVE-2026-69435 9.6 CRITICAL Azure SRE Agent Elevation of Privilege Vulnerability
CVE-2026-83943 8.7 HIGH Azure API Center Information Disclosure Vulnerability
CVE-2026-83947 7.7 HIGH Azure Event Grid Spoofing Vulnerability

IV. Related Vulnerabilities

Same product: Azure App Service for Linux
Same vendor: Microsoft
Same weakness: CWE-306

V. Comments for CVE-2026-77900

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