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Vulnerability details

CVE-2026-77900

Microsoft Azure App Service for Linux

Azure App Service Remote Code Execution Vulnerability

CVSS 3.1
9.8Critical

Official description

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

CVSS scores

ScoreVersionSourceVector
9.8Critical 3.1 CVEProject cvelistV5 (CNA) (microsoft) 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

Affected products

VendorProductVersionsSource
Microsoft Azure App Service for Linux All CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-10-09
Last updated
2026-10-31
State
Published
Assigner (CNA)
microsoft

Exploit prediction (EPSS)

0.72%
Probability of exploitation in 30 days
54.1%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-306
    Missing Authentication for Critical Function