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CVE-2025-47979

20
FAUCET Score

CVE-2025-47979 is a medium-severity vulnerability affecting Microsoft Windows Server 2022 23H2 and Windows Server 2025, where sensitive information is improperly inserted into log files within Windows Failover Cluster. An authorized local attacker can exploit this with low complexity to achieve high confidentiality impact by disclosing sensitive data. While not actively exploited or listed in KEV, the vulnerability has garnered significant community and media attention, with no public exploit code currently available.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.0.25398.1913CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
<= 10.0.26100.6899CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 94th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 (4)

microsoftpatch availablevia msrc
Product: Windows Server 2025 (Server Core installation)Fixed in: 10.0.26100.6899
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2025Fixed in: 10.0.26100.6899
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2022, 23H2 Edition (Server Core installation)Fixed in: 10.0.25398.1913
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-Oct/CVE-2025-47979Important

Microsoft Failover Cluster Information Disclosure Vulnerability

Oct 14, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-47979
Vendor Advisory