Internet Connection Sharing Denial of Service Vulnerability in Microsoft Products
CVE-2025-21254

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
11 February 2025

What is CVE-2025-21254?

A vulnerability in the Internet Connection Sharing (ICS) feature of Microsoft products enables a Denial of Service (DoS) attack, potentially disrupting network connectivity. An attacker can exploit this vulnerability to cause significant disruption by sending crafted packets. It is crucial to evaluate your systems for this security issue and implement necessary measures to mitigate the risk.

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Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.7785

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.6893

Windows 10 Version 21H2 32-bit Systems 10.0.19043.0 < 10.0.19044.5487

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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