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CVE-2024-21397

18
FAUCET Score

CVE-2024-21397 is an Elevation of Privilege vulnerability affecting Microsoft Azure File Sync. With a CVSS score of 5.3 (Medium), it requires local access and high attack complexity, allowing a low-privileged attacker to achieve high integrity and low availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog. Community discussion and media coverage are minimal, with only one mention and one article published by BleepingComputer.

Impacted Technologies

VendorProductVersion(s)CPE
>= 14.0.0, < 16.2CPE match
cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:*
>= 15.0.0, < 16.2CPE match
cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:*
>= 16.0.0, < 16.2CPE match
cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:*
>= 17.0.0, < 17.1CPE match
cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:*
>= 14.0.0.0, < 16.2.0.0CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
1.0
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 86th percentile among its peer group of 1,297 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Azure File Sync v16.0Fixed in: 16.2
View patch
microsoftpatch availablevia msrc
Product: Azure File Sync v15.0Fixed in: 16.2
View patch
microsoftpatch availablevia msrc
Product: Azure File Sync v14.0Fixed in: 16.2
View patch
microsoftpatch availablevia msrc
Product: Azure File Sync v17.0Fixed in: 17.1
View patch

Vendor Advisories (1)

microsoft2024-Feb/CVE-2024-21397Important

Microsoft Azure File Sync Elevation of Privilege Vulnerability

Feb 13, 2024

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2024-21397
PatchVendor Advisory