CVE-2020-16899
highpriority · attend · 46EPSS 0.135 · 96 %ileexploit · PoCEURUUSEPSS · scored 2026-10-27
<p>A denial of service vulnerability exists when the Windows TCP/IP stack improperly handles ICMPv6 Router Advertisement packets. An attacker who successfully exploited this vulnerability could cause a target system to stop responding.</p> <p>To exploit this vulnerability, an attacker would have to send specially crafted ICMPv6 Router Advertisement packets to a remote Windows computer. The vulnerability would not allow an attacker to execute code or to elevate user rights directly.</p> <p>The update addresses the vulnerability by correcting how the Windows TCP/IP stack handles ICMPv6 Router Advertisement packets.</p>
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
affected products (35)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
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references (8)
External citations — patches, advisories, analysis.
- http://www.nsfocus.net/vulndb/49958cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-16899cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16899cnnvd
- https://portal.msrc.microsoft.com/en-us/security-guidancePatchcnnvd
- https://portal.msrc.microsoft.com/zh-CN/security-guidance/advisory/CVE-2020-16899cnnvd
- https://vigilance.fr/vulnerability/Microsoft-Windows-vulnerabilities-of-October-2020-33562cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16899enisa_euvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16899PatchVendor Advisorynvd
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