CVE-2026-72931: Windows Secure Socket Tunneling Protocol (SSTP) Denial of Service Vulnerability
Missing release of resource after effective lifetime in Windows Secure Socket Tunneling Protocol (SSTP) allows an authorized attacker to deny service locally.
Other sources
Windows Secure Socket Tunneling Protocol (SSTP) Denial of Service Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- 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 10.0.19044.7725Patch KB5122878 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
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Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - 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 10.0.19045.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must already be authorized on the affected Windows system and must be able to act locally. The provided severity vector indicates low privileges are required and no user interaction is required.
What is the likely impact if exploitation succeeds?
Successful exploitation can deny service by triggering a resource-release flaw in SSTP. The provided data identifies availability impact only; it does not indicate confidentiality or integrity impact.
Which systems should be reviewed for exposure?
Review Microsoft Windows 10, Windows 11, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025 systems that use SSTP. The supplied information does not identify unaffected versions or configurations.