CVE-2026-70347: Windows Installer Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
Other sources
Windows Installer Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 10.0.14393.9418Patch KB5120418 - Upgrade
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Fixed in 6.2.9200.26279Patch KB5120385 - Upgrade
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Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
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Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26000.9106Patch KB5120994 - Upgrade
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Fixed in 6.3.9600.23337Patch KB5120386 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.22631.7517Patch KB5120240 - Upgrade
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Fixed in 10.0.26200.9168Fixed in 10.0.26100.9106Patch KB5120994 - 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
Event History
Frequently Asked Questions
What is the severity of CVE-2026-70347?
CVE-2026-70347 has a severity rating of high with a score of 7.8.
What is CVE-2026-70347?
CVE-2026-70347 is a Windows Installer Elevation of Privilege Vulnerability due to a heap-based buffer overflow.
How do I fix CVE-2026-70347?
To fix CVE-2026-70347, ensure that you have installed the latest security updates for your Microsoft Windows operating system.
What are the affected systems of CVE-2026-70347?
CVE-2026-70347 affects various versions of Microsoft Windows including Windows 10, Windows 11, and several Windows Server versions.
What type of vulnerability is CVE-2026-70347?
CVE-2026-70347 is classified as a buffer overflow vulnerability that allows privilege escalation.