CVE-2026-61366: Windows Network Connection Broker Elevation of Privilege Vulnerability
Double free in Windows Network Connection Broker allows an authorized attacker to elevate privileges locally.
Other sources
Windows Network Connection Broker Elevation of Privilege 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 10.0.14393.9418Patch KB5120418 - Upgrade
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Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
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Fixed in 10.0.22631.7517Patch KB5120240 - Upgrade
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Fixed in 10.0.19045.7663Patch KB5120249 - Upgrade
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Fixed in 10.0.19044.7663Patch KB5120249 - Upgrade
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Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
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Fixed in 10.0.17763.9115Patch KB5120238 - Upgrade
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Fixed in 6.3.9600.23338Patch KB5120385 - Upgrade
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Fixed in 6.2.9200.26280Patch KB5120386 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26200.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.26200.9168Fixed in 10.0.26200.9106Patch KB5120994
Event History
Frequently Asked Questions
What is the severity of CVE-2026-61366?
CVE-2026-61366 has a severity rating of high, with a score of 7.
How do I fix CVE-2026-61366?
To fix CVE-2026-61366, ensure your Microsoft Windows system is updated with the latest security patches.
What systems are affected by CVE-2026-61366?
CVE-2026-61366 affects Microsoft Windows 10, Windows 11, and various versions of Windows Server including 2012, 2016, 2025, 2022, and 2019.
What type of vulnerability is CVE-2026-61366?
CVE-2026-61366 is classified as a double free vulnerability in the Windows Network Connection Broker.
Can CVE-2026-61366 be exploited remotely?
CVE-2026-61366 requires local access, meaning it cannot be exploited remotely.