CyberSecBulletin
CVE-2025-26673NVD status: Analyzed

Windows 10 Version 1507: Uncontrolled Resource Consumption

Published Updated By the CyberSecBulletin desk

CVE-2025-26673 is a high-severity uncontrolled resource consumption vulnerability in Windows 10 Version 1507 from Microsoft, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 10.0.10240.20978 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 2.73% chance of exploitation within 30 days, higher than 86% 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 10.0.10240.20978 or a later version.
  2. Update Windows 10 Version 1607 to 10.0.14393.7969 or a later version.
  3. Update Windows 10 Version 1809 to 10.0.17763.7136 or a later version.
  4. Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.
  5. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
MicrosoftWindows 10 Version 150710.0.10240.0 up to, but not including, 10.0.10240.2097810.0.10240.20978
MicrosoftWindows 10 Version 160710.0.14393.0 up to, but not including, 10.0.14393.796910.0.14393.7969
MicrosoftWindows 10 Version 180910.0.17763.0 up to, but not including, 10.0.17763.713610.0.17763.7136
MicrosoftWindows 10 Version 21H210.0.19044.0 up to, but not including, 10.0.19044.573710.0.19044.5737
MicrosoftWindows 10 Version 22H210.0.19045.0 up to, but not including, 10.0.19045.573710.0.19045.5737
MicrosoftWindows 11 version 22H210.0.22621.0 up to, but not including, 10.0.22621.518910.0.22621.5189
MicrosoftWindows 11 version 22H310.0.22631.0 up to, but not including, 10.0.22631.518910.0.22631.5189
MicrosoftWindows 11 Version 23H210.0.22631.0 up to, but not including, 10.0.22631.518910.0.22631.5189
MicrosoftWindows 11 Version 24H210.0.26100.0 up to, but not including, 10.0.26100.377510.0.26100.3775
MicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.0 up to, but not including, 6.1.7601.276706.1.7601.27670
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 up to, but not including, 6.1.7601.276706.1.7601.27670
MicrosoftWindows Server 2008 Service Pack 26.0.6003.0 up to, but not including, 6.0.6003.232206.0.6003.23220
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 up to, but not including, 6.0.6003.232206.0.6003.23220
MicrosoftWindows Server 20126.2.9200.0 up to, but not including, 6.2.9200.254236.2.9200.25423
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 up to, but not including, 6.2.9200.254236.2.9200.25423
MicrosoftWindows Server 2012 R26.3.9600.0 up to, but not including, 6.3.9600.225236.3.9600.22523
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 up to, but not including, 6.3.9600.225236.3.9600.22523
MicrosoftWindows Server 201610.0.14393.0 up to, but not including, 10.0.14393.796910.0.14393.7969
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 up to, but not including, 10.0.14393.796910.0.14393.7969
MicrosoftWindows Server 201910.0.17763.0 up to, but not including, 10.0.17763.713610.0.17763.7136
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 up to, but not including, 10.0.17763.713610.0.17763.7136
MicrosoftWindows Server 202210.0.20348.0 up to, but not including, 10.0.20348.345310.0.20348.3453
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 up to, but not including, 10.0.25398.155110.0.25398.1551
MicrosoftWindows Server 202510.0.26100.0 up to, but not including, 10.0.26100.377510.0.26100.3775
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 up to, but not including, 10.0.26100.377510.0.26100.3775

Version data comes from the organisation that assigned the CVE; 10 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

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

Official description

Uncontrolled resource consumption in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.

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

The underlying weakness: Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

How developers prevent this class of flaw

  • Ensure that protocols have specific limits of scale placed on them.
  • Ensure that all failures in resource allocation place the system into a safe posture.

More Uncontrolled Resource Consumption vulnerabilities (CWE-400)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  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 Uncontrolled Resource Consumption vulnerabilities

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