What’s Vulnerable › Vulnerabilities

CVE-2018-8626

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 21.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-12-12 · updated 2026-06-17
• Weakness: CWE-787

Description

A remote code execution vulnerability exists in Windows Domain Name System (DNS) servers when they fail to properly handle requests, aka "Windows DNS Server Heap Overflow Vulnerability." This affects Windows Server 2012 R2, Windows Server 2019, Windows Server 2016, Windows 10, Windows 10 Servers.

Affected products

• Microsoft Windows 10 Version 1607: 1607, 1709, 1803, 1809
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: 1709, 1803
• Microsoft Windows Server 2019: all versions
• Microsoft Windows 10 Version 1607: Version 1607 for 32-bit Systems, Version 1607 for x64-based Systems, Version 1709 for 32-bit Systems, Version 1709 for ARM64-based Systems, Version 1709 for x64-based Systems, Version 1803 for 32-bit Systems (+5)
• Microsoft Windows 10 Servers: version 1709 (Server Core Installation), version 1803 (Server Core Installation)
• Microsoft Windows Server 2012 R2: (Server Core installation)
• Microsoft Windows Server 2016: (Server Core installation)
• Microsoft Windows Server 2019: (Server Core installation)

References

• http://www.securityfocus.com/bid/106076
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8626
• http://www.securityfocus.com/bid/106076
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8626

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