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CVE-2024-21421

23
FAUCET Score

CVE-2024-21421 is a high-severity spoofing vulnerability affecting the Microsoft Azure Software Development Kit (SDK). With a CVSS score of 7.5, this vulnerability allows an unauthenticated attacker to achieve high confidentiality impact without user interaction, indicating a significant risk of data exposure. While there is no known active exploitation or publicly available exploit code, the vulnerability has garnered some community discussion and media coverage, suggesting awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, < 1.29.5CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_software_development_kit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.84%
Probability of exploitation in next 30 days
EPSS Percentile
76.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0184 is in the 60th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Azure SDKFixed in: 1.29.5
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2024-Mar/CVE-2024-21421Important

Azure SDK Spoofing Vulnerability

Mar 12, 2024

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2024-21421
Vendor Advisory