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CVE-2026-77900Critical

Azure App Service Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity
Critical
CVSS base score
9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
EPSS, next 30 days
Not scored yet
Public exploit code
No Nuclei template lists it
Exploitability
Not assessed
Publicly disclosed
No
Customer action
Not required (service-side fix)
Component
Azure App Service
Weakness
CWE-306: Missing Authentication for Critical Function
Issued by
Microsoft
Published
8 Oct 2026 · October 2026
Last revised
8 Oct 2026

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Azure
1 affected product
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