CVE-2026-77900

Azure App Service Remote Code Execution Vulnerability

Published Oct 8, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.
Title Azure App Service Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft azure App Service
Weaknesses CWE-306
CPEs cpe:2.3:a:microsoft:azure_app_service:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft azure App Service
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 8:46 PM
Reserved
Aug 21, 2026, 5:26 PM
Status
Awaiting Analysis
Published
Oct 8, 2026, 11:17 PM
Modified
Oct 10, 2026, 4:18 AM