CVE-2025-53805 HTTP.sys Denial of Service Vulnerability
An out-of-bounds read in HTTP.sys allows remote attackers to cause a denial of service on Windows systems.
- 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-2025-53805?
CVE-2025-53805 is a high-severity denial of service vulnerability in Microsoft Windows 11 22h2, published on 9 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Out-of-bounds read in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
Weakness: CWE-125
Which versions are affected by CVE-2025-53805?
It affects 6 products.
Products include Microsoft Windows 11 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.
How do I fix CVE-2025-53805?
No fix has been published for CVE-2025-53805 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-2025-53805 being exploited?
There is no known exploitation of CVE-2025-53805 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 22h2
- CVE-2024-49117 Windows Hyper-V Remote Code Execution Vulnerability
- CVE-2024-21435 Windows OLE Remote Code Execution Vulnerability
- CVE-2025-24084 Windows Subsystem for Linux (WSL2) Kernel Remote Code Execution Vulnerability
- CVE-2025-33054 Remote Desktop Spoofing Vulnerability
- CVE-2025-29828 Windows Schannel Remote Code Execution Vulnerability
Sources
Also known as GHSA-j53j-mff4-vmcg.