CVE-2026-72964: Windows Internet Connection Sharing (ICS) Tampering Vulnerability
Missing authentication for critical function in Windows Internet Connection Sharing (ICS) allows an authorized attacker to perform tampering locally.
Other sources
Windows Internet Connection Sharing (ICS) Tampering Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
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Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
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Fixed in 10.0.17763.9245Patch KB5122876 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7725Patch KB5122878
Event History
Frequently Asked Questions
Who is realistically exposed to this issue?
Systems running the listed Windows 10, Windows 11, Windows Server 2016, Windows Server 2019, Windows Server 2022, or Windows Server 2025 products are in scope. Exploitation requires local access and authorized privileges, so it is not described as remotely exploitable.
What does an attacker need to exploit it?
An attacker must already be authorized on the affected system and be able to act locally. No user interaction is required according to the provided severity vector.
What is the expected impact of successful exploitation?
Successful exploitation allows tampering through a critical ICS function. The supplied vector indicates integrity impact only; it does not indicate confidentiality or availability impact.