Windows Internet Information Services
CVE-2025-53805 — HTTP.sys Denial of Service Vulnerability
Executive Summary
Out-of-bounds read in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
Overview
7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 6.5
EPSS Score
0.01345
probability of exploitation in the next 30 days
0.67737 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
11 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 11 Version 22H2 for ARM64-based Systems | 5065431 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 22H2 for x64-based Systems | 5065431 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 23H2 for ARM64-based Systems | 5065431 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 23H2 for x64-based Systems | 5065431 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 24H2 for ARM64-based Systems | 5065426 (Security Update) 5065474 (SecurityHotpatchUpdate) |
Important | Denial of Service | Yes |
| Windows 11 Version 24H2 for x64-based Systems | 5065426 (Security Update) 5065474 (SecurityHotpatchUpdate) |
Important | Denial of Service | Yes |
| Windows Server 2022 | 5065432 (Security Update) 5065306 (SecurityHotpatchUpdate) |
Important | Denial of Service | Yes |
| Windows Server 2022 (Server Core installation) | 5065432 (Security Update) 5065306 (SecurityHotpatchUpdate) |
Important | Denial of Service | Yes |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 5065425 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2025 | 5065426 (Security Update) 5065474 (SecurityHotpatchUpdate) |
Important | Denial of Service | Yes |
| Windows Server 2025 (Server Core installation) | 5065426 (Security Update) 5065474 (SecurityHotpatchUpdate) |
Important | Denial of Service | Yes |
Patches
4 patches
| Article | Type | Restart |
|---|---|---|
5065431 |
Security Update | Yes |
5065426 (Security Update) 5065474 |
Security Update | Yes |
5065432 (Security Update) 5065306 |
Security Update | Yes |
5065425 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Rutuja Shirali with Microsoft, Yesayi Hovnanyan with Microsoft, Matthew Cox with Microsoft, Matthew Cox with Microsoft
References
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