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CVE-2025-27738

Windows Resilient File System (ReFS) Information Disclosure Vulnerability

No known exploitation. EPSS puts it in the 89th percentile. Fixed versions are out.

CVSS 3.16.5MediumEPSS percentile89th3.5% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products9 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows 10 Version 1507Affected: ≥ 10.0.10240.0, < 10.0.10240.20978Upgrade to: 10.0.10240.20978Affected: ≥ 10.0.14393.0, < 10.0.14393.7969Upgrade to: 10.0.14393.7969Affected: ≥ 10.0.17763.0, < 10.0.17763.7136Upgrade to: 10.0.17763.7136Affected: ≥ 10.0.19044.0, < 10.0.19044.5737Upgrade to: 10.0.19044.5737 + 1 more branchStated by: CVE record
  • Microsoft Windows 11 version 22H2Affected: ≥ 10.0.22621.0, < 10.0.22621.5189Upgrade to: 10.0.22621.5189Affected: ≥ 10.0.22631.0, < 10.0.22631.5189Upgrade to: 10.0.22631.5189Affected: ≥ 10.0.26100.0, < 10.0.26100.3775Upgrade to: 10.0.26100.3775Stated by: CVE record
  • Microsoft Windows Server 2012Affected: ≥ 6.2.9200.0, < 6.2.9200.25423Upgrade to: 6.2.9200.25423Stated by: CVE record
  • Microsoft Windows Server 2012 R2Affected: ≥ 6.3.9600.0, < 6.3.9600.22523Upgrade to: 6.3.9600.22523Stated by: CVE record
  • Microsoft Windows Server 2016Affected: ≥ 10.0.14393.0, < 10.0.14393.7969Upgrade to: 10.0.14393.7969Stated by: CVE record

Versions as the sources state them. 3 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

Improper access control in Windows Resilient File System (ReFS) allows an authorized attacker to disclose information over a network.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS89th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

3.5% chance of exploitation activity in the next 30 days, which ranks it in the 89th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 443 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Publishedweakness classified

Affected products

And 47 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 6.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity NoneNo integrity impact
  • Availability NoneNo availability impact

Weaknesses

Sources

References in the record

In the news

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