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CVE-2024-21403

25
FAUCET Score

CVE-2024-21403 is a critical Elevation of Privilege vulnerability affecting Microsoft Azure Kubernetes Service Confidential Containers. With a CVSS score of 9.0, this vulnerability allows an unauthenticated attacker to achieve high impact on confidentiality, integrity, and availability with high attack complexity over the network. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered some community discussion and media coverage, indicating awareness of its potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:azure_kubernetes_service:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.0CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0134 is in the 61st percentile among its peer group of 201 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.4 Reddit, 1.3 Bluesky, 0.9 Mastodon, and 2.3 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.8 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Azure Kubernetes Service Confidential ContainersFixed in: 0.3.3
View patch

Vendor Advisories (1)

microsoft2024-Feb/CVE-2024-21403Important

Microsoft Azure Kubernetes Service Confidential Container Elevation of Privilege Vulnerability

Feb 13, 2024

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2024-21403
PatchVendor Advisory