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CVE-2025-21174

22
FAUCET Score

CVE-2025-21174 is a high-severity vulnerability affecting Windows Server versions 2012 through 2025, allowing an unauthenticated attacker to cause a denial of service through uncontrolled resource consumption in the Standards-Based Storage Management Service. With a CVSS score of 7.5, this network-exploitable flaw requires no user interaction and has a high impact on availability. While not currently in CISA's KEV catalog and lacking public exploit code in Metasploit or ExploitDB, its high FAUCET Risk Score of 97/100 and mention in a BleepingComputer article indicate significant concern within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
r2CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
< 10.0.14393.7969CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
< 10.0.17763.7136CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
< 10.0.20348.3453CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
< 10.0.26100.3775CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

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:N/I:N/A:H

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

Exploit Intelligence

EPSS Score
1.92%
Probability of exploitation in next 30 days
EPSS Percentile
77.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0192 is in the 61st 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 (11)

microsoftpatch availablevia msrc
Product: Windows Server 2012 R2 (Server Core installation)Fixed in: 6.3.9600.22523
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2019Fixed in: 10.0.17763.7136
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2019 (Server Core installation)Fixed in: 10.0.17763.7136
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2022Fixed in: 10.0.20348.3453
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2022 (Server Core installation)Fixed in: 10.0.20348.3453
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2025 (Server Core installation)Fixed in: 10.0.26100.3775
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2025Fixed in: 10.0.26100.3775
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016Fixed in: 10.0.14393.7969
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016 (Server Core installation)Fixed in: 10.0.14393.7969
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2Fixed in: 6.3.9600.22523
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-Apr/CVE-2025-21174Important

Windows Standards-Based Storage Management Service Denial of Service Vulnerability

Apr 8, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-21174
Vendor Advisory