Login Request a demo
High severity · published Sep 9, 2025
CVE-2025-53805
HTTP.sys Denial of Service Vulnerability
7.5
CVSS
1.5%
EPSS
No
On KEV
Description
Out-of-bounds read in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W1
Windows 11 Version 23H2 · Microsoft
10.0.22631.0 before 10.0.22631.5909 · source: vendor
W1
Windows 11 Version 24H2 · Microsoft
10.0.26100.0 before 10.0.26100.6584 · source: vendor
W1
Windows 11 version 22H2 · Microsoft
10.0.22621.0 before 10.0.22621.5909 · source: vendor
W1
Windows 11 version 22H3 · Microsoft
10.0.22631.0 before 10.0.22631.5909 · source: vendor
WS
Windows Server 2022 · Microsoft
10.0.20348.0 before 10.0.20348.4171 · source: vendor, NVD
WS
Windows Server 2022, 23H2 Edition (Server Core installation) · Microsoft
10.0.25398.0 before 10.0.25398.1849 · source: vendor
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.6584 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.6584 · source: vendor
W1
Windows 11 22h2 · Microsoft
before 10.0.22621.5909 · source: NVD
W1
Windows 11 23h2 · Microsoft
before 10.0.22631.5909 · source: NVD
W1
Windows 11 24h2 · Microsoft
before 10.0.26100.6508 · source: NVD
WS
Windows Server 2022 23h2 · Microsoft
before 10.0.25398.1849 · source: NVD
Affected product
W1
Windows 11 version 22H2
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-53805
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-53805
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53805
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