CVE-2024-43521 Windows Hyper-V Denial of Service Vulnerability
An attacker can cause a denial of service in Windows Hyper-V, affecting Windows Server environments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-43521?
CVE-2024-43521 is a high-severity denial of service vulnerability in Microsoft Windows Server 2012, published on 8 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Windows Hyper-V Denial of Service Vulnerability
Weakness: CWE-253
Which versions are affected by CVE-2024-43521?
It affects 5 products.
Products include Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2.
How do I fix CVE-2024-43521?
No fix has been published for CVE-2024-43521 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-2024-43521 being exploited?
There is no known exploitation of CVE-2024-43521 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2012
- CVE-2025-59287 Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data
- CVE-2026-69595 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-78445 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability
- CVE-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability
Sources
Also known as GHSA-p54w-fqq6-5g63.