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CVE-2025-32721NVD status: Analyzed

Windows 10 Version 1507: Improper Link Resolution Before File Access

Published Updated By the CyberSecBulletin desk

CVE-2025-32721 is a high-severity improper link resolution before file access vulnerability in Windows 10 Version 1507 from Microsoft, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. The record lists version 10.0.10240.21034 as the first without the flaw, so updating Windows 10 Version 1507 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.69% chance of exploitation within 30 days, higher than 53% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Windows 10 Version 1507 to 10.0.10240.21034 or a later version.
  2. Update Windows 10 Version 1607 to 10.0.14393.8148 or a later version.
  3. Update Windows 10 Version 1809 to 10.0.17763.7434 or a later version.
  4. Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.
  5. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
MicrosoftWindows 10 Version 150710.0.10240.0 up to, but not including, 10.0.10240.2103410.0.10240.21034
MicrosoftWindows 10 Version 160710.0.14393.0 up to, but not including, 10.0.14393.814810.0.14393.8148
MicrosoftWindows 10 Version 180910.0.17763.0 up to, but not including, 10.0.17763.743410.0.17763.7434
MicrosoftWindows 10 Version 21H210.0.19044.0 up to, but not including, 10.0.19044.596510.0.19044.5965
MicrosoftWindows 10 Version 22H210.0.19045.0 up to, but not including, 10.0.19045.596510.0.19045.5965
MicrosoftWindows 11 version 22H210.0.22621.0 up to, but not including, 10.0.22621.547210.0.22621.5472
MicrosoftWindows 11 version 22H310.0.22631.0 up to, but not including, 10.0.22631.547210.0.22631.5472
MicrosoftWindows 11 Version 23H210.0.22631.0 up to, but not including, 10.0.22631.547210.0.22631.5472
MicrosoftWindows 11 Version 24H210.0.26100.0 up to, but not including, 10.0.26100.434910.0.26100.4349
MicrosoftWindows Server 201610.0.14393.0 up to, but not including, 10.0.14393.814810.0.14393.8148
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 up to, but not including, 10.0.14393.814810.0.14393.8148
MicrosoftWindows Server 201910.0.17763.0 up to, but not including, 10.0.17763.743410.0.17763.7434
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 up to, but not including, 10.0.17763.743410.0.17763.7434
MicrosoftWindows Server 202210.0.20348.0 up to, but not including, 10.0.20348.380710.0.20348.3807
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 up to, but not including, 10.0.25398.166510.0.25398.1665
MicrosoftWindows Server 202510.0.26100.0 up to, but not including, 10.0.26100.434910.0.26100.4349
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 up to, but not including, 10.0.26100.434910.0.26100.4349
MicrosoftWindows 10 1507before 10.0.10240.2103410.0.10240.21034
MicrosoftWindows 10 1607before 10.0.14393.814810.0.14393.8148
MicrosoftWindows 10 1809before 10.0.17763.743410.0.17763.7434
MicrosoftWindows 10 21h2before 10.0.19044.596510.0.19044.5965
MicrosoftWindows 10 22h2before 10.0.19045.596510.0.19045.5965
MicrosoftWindows 11 22h2before 10.0.22621.547210.0.22621.5472
MicrosoftWindows 11 23h2before 10.0.22631.547210.0.22631.5472
MicrosoftWindows 11 24h2before 10.0.26100.427010.0.26100.4270

Version data comes from the organisation that assigned the CVE; 1 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
RequiredA user must take an action such as opening a file or link.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. Scored by CNA (microsoft.com).

Official description

Improper link resolution before file access ('link following') in Windows Recovery Driver allows an authorized attacker to elevate privileges locally.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Link Resolution Before File Access

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

How developers prevent this class of flaw

  • Follow the principle of least privilege when assigning access rights to entities in a software system. Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

More Improper Link Resolution Before File Access vulnerabilities (CWE-59)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Windows 10 Version 1507

All Windows 10 Version 1507 vulnerabilities

Recent Improper Link Resolution Before File Access vulnerabilities

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