CVE-2021-40463 Windows Network Address Translation (NAT) Denial of Service Vulnerability
An attacker can cause a denial of service in Windows Network Address Translation, affecting Windows client and server operating systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-40463?
CVE-2021-40463 is a high-severity denial of service vulnerability in Microsoft Windows 10, published on 13 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Windows Network Address Translation (NAT) Denial of Service Vulnerability
Which versions are affected by CVE-2021-40463?
It affects 8 products.
Products include Microsoft Windows 10, Microsoft Windows 11 21h2, Microsoft Windows 8.1, Microsoft Windows Rt 8.1, Microsoft Windows Server 2012, Microsoft Windows Server 2016 and 2 more.
How do I fix CVE-2021-40463?
No fix has been published for CVE-2021-40463 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-40463 being exploited?
There is no known exploitation of CVE-2021-40463 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10
- CVE-2015-2426 Microsoft Windows Adobe Type Manager Library Remote Code Execution
- CVE-2015-1769 Microsoft Windows Mount Manager Privilege Escalation
- CVE-2020-1467 Windows Hard Link Elevation of Privilege Vulnerability
- CVE-2021-26424 Windows TCP/IP Remote Code Execution Vulnerability
- CVE-2021-28476 Windows Hyper-V Remote Code Execution Vulnerability
Sources
Also known as GHSA-m432-g357-h2xx.