HIGHCVSS 7.1Actively exploited · CISA KEV since 2025-02-11Vulnerability

CVE-2025-21391

Microsoft Windows Storage contains a link following vulnerability that could allow for privilege escalation. This vulnerability could allow an attacker to delete data including data that results in the service being unavailable.

Properties

Euvd product
Windows Server 2025 (Server Core installation), Windows 10 Version 21H2, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2019, Windows 10 Version 22H2, Windows 11 version 22H3, Windows Server 2022, Windows Server 2019 (Server Core installation), Windows Server 2025, Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows 11 version 22H2, Windows 11 Version 24H2, Windows 11 Version 23H2, Windows 10 Version 1507
Vulnerability name
Microsoft Windows Storage Link Following Vulnerability
First seen
2026-02-26T19:09:04+00:00
Cvss score
7.1
Epss score
0.02303
Last seen
2026-10-19T12:00:27+00:00
Due date
2025-03-04
Euvd assigner
microsoft
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2025-02-11T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2025-02-11
Euvd base score version
3.1
Score
7.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Microsoft
Cvss vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
7.1

Related Entities (19)

AFFECTS_PRODUCT (16)

→[Product]cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]Microsoft Windows Storage Link Following Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Link Resolution Before File Access ('Link Following')

INVOLVES (1)

←[Signal]kev_added · 2025-02-11

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CVE-2025-21391 (CVSS 7.1) — Ninja Signal Threat Intelligence | Ninja Signal