CVE-2024-21376Network attack vector

Unauthenticated remote code execution

Published Feb 13, 2024 · Updated Aug 10, 2026

Remote code execution in Microsoft Azure Kubernetes Service Confidential Containers allows remote attackers to execute code over a network. Microsoft has not published the affected component, entry point, or access-control operation that mishandles untrusted input. Exploitation requires no authentication or user interaction but has high attack complexity, and successful execution crosses a security boundary.

CVSS severity9.0
Critical
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Microsoft Azure Kubernetes Service Confidential Containers allows remote attackers to execute code over a network. Microsoft has not published the affected component, entry point, or access-control operation that mishandles untrusted input. Exploitation requires no authentication or user interaction but has high attack complexity, and successful execution crosses a security boundary.

The record

CVE
CVE-2024-21376
Published
Feb 13, 2024
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Azure Kubernetes Service
Classifications
CWE-284
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <0.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Azure Kubernetes Serviceversion=1.0.0 <0.3.3

Published CVSS scores

9.0Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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