CVE-2026-62878: Windows DNS Server Remote Code Execution Vulnerability
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
Other sources
Windows DNS Server Remote Code Execution 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 6.3.9600.23337Patch KB5120386 - Upgrade
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Fixed in 6.2.9200.26279Patch KB5120385 - Upgrade
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Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9115Patch KB5120238
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62878?
CVE-2026-62878 is rated as critical with a severity score of 9.8.
How do I fix CVE-2026-62878?
To mitigate CVE-2026-62878, apply the latest security patches provided by Microsoft for affected Windows versions.
What exploit does CVE-2026-62878 facilitate?
CVE-2026-62878 allows an unauthorized attacker to execute remote code via a stack-based buffer overflow in Windows DNS.
Which versions of Windows are affected by CVE-2026-62878?
CVE-2026-62878 affects Microsoft Windows 10, Windows Server 2012 through 2025, including newer versions.
What are the potential impacts of CVE-2026-62878?
The potential impacts of CVE-2026-62878 include unauthorized code execution, leading to complete system compromise.