CVE-2026-34351: Windows TCP/IP Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
Other sources
Windows TCP/IP Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.3.9600.23181Patch KB5087471 - Upgrade
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Fixed in 10.0.14393.9140Patch KB5087537 - Upgrade
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Fixed in 6.2.9200.26079Patch KB5087470 - Upgrade
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Fixed in 10.0.28000.2113Patch KB5089548 - Upgrade
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Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423 - Upgrade
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Fixed in 10.0.26100.8457Fixed in 10.0.26100.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.25398.2330Patch KB5087541 - Upgrade
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Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.22631.7219Patch KB5093998 - Upgrade
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Fixed in 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.22631.7079Patch KB5087420 - Upgrade
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Fixed in 10.0.19044.7291Patch KB5087544 - Upgrade
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Fixed in 10.0.20348.5139Fixed in 10.0.20348.5074Patch KB5087424 - Upgrade
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Fixed in 10.0.17763.8755Patch KB5087538
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34351?
CVE-2026-34351 has been rated with a high severity level due to its potential for allowing local privilege escalation.
How do I fix CVE-2026-34351?
To remediate CVE-2026-34351, apply the available patches and updates provided by Microsoft for affected Windows versions.
Which Microsoft products are affected by CVE-2026-34351?
CVE-2026-34351 affects multiple versions of Windows Server and Windows 10/11, including Windows Server 2012, 2016, 2019, 2022, and various Windows 10 and 11 editions.
Can CVE-2026-34351 be exploited remotely?
No, CVE-2026-34351 requires local access to the system for exploitation, as it is a privilege escalation vulnerability.
What are the potential impacts of exploiting CVE-2026-34351?
Exploiting CVE-2026-34351 could allow an attacker to gain higher privileges on the affected system, which could lead to unauthorized access and control.