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CVE-2024-21381

18
FAUCET Score

CVE-2024-21381 is a spoofing vulnerability affecting Microsoft Azure Active Directory B2C. This medium-severity flaw, with a CVSS score of 6.8, could allow an authenticated attacker to compromise confidentiality and integrity with high impact, though it requires high attack complexity. There is currently no evidence of active exploitation, no public exploit code available, and it has garnered minimal community discussion or media coverage beyond its mention in Microsoft's February 2024 Patch Tuesday.

Impacted Technologies

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

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 28th percentile among its peer group of 1,425 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Azure Active Directory B2C
View patch

Vendor Advisories (1)

microsoft2024-Feb/CVE-2024-21381Important

Microsoft Azure Active Directory B2C Spoofing Vulnerability

Feb 13, 2024

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2024-21381
PatchVendor Advisory