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CVE-2025-21391 CISA KEV · Actively exploited

Vulnerability in Microsoft Windows 10 1507

CVSS score

7.1

EPSS probability

%2.3

Risk score

0.3

Published

1 y ago

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach CVE AI Research

CVE-2025-21391 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Windows Storage Elevation of Privilege Vulnerability

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2025-21391 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1microsoftwindows 10 1507 View
2microsoftwindows 10 1607 View
3microsoftwindows 10 1809 View
4microsoftwindows 10 21h2 View
5microsoftwindows 10 22h2 View
6microsoftwindows 11 22h2 View
7microsoftwindows 11 23h2 View
8microsoftwindows 11 24h2 View
9microsoftwindows server 2016 View
10microsoftwindows server 2019 View
11microsoftwindows server 2022 View
12microsoftwindows server 2022 23h2 View
13microsoftwindows server 2025 View
14microsoftwindows View
Total affected vendors: 1|Products: 14

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.1CVSS 3.x—CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:F/RL:O/RC:CMicrosoft MSRC
7.1CVSS V31HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

20 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
reference

Yama veya çözüm referansı

Open source
reference

5052000

Open source
reference

Yama veya çözüm referansı

Open source
reference

5051979

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

5051974

Open source
reference

Yama veya çözüm referansı

Open source
reference

5051989

Open source
reference

Yama veya çözüm referansı

Open source
reference

5051987

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

This CVE is marked as actively exploited in the CISA KEV catalogue, but no verified, downloadable public PoC or Metasploit module has been found yet. Evidence of active exploitation does not mean that public exploit code exists.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-21391 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-21391 weaknesses.

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

CVSS Vector Radar Chart

7.1 / 10
Attack VectorLocalComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

20 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

Weakness Type (CWE & CAPEC)

Similar Vulnerabilities

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2025-21391"