CVE-2026-33096
HTTP.sys Denial of Service Vulnerability
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
HTTP.sys Denial of Service Vulnerability
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-33096- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-22617
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
- Record
EUVD-2026-22617- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-8cm7-r3pw-h7fx
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a...
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
- Record
GHSA-8cm7-r3pw-h7fx- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
NVD
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-33096- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
Affected products
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- microsoft windows server 2022
- microsoft windows server 2022, 23h2 edition (server core installation)
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 11 23h2
- microsoft windows 11 24h2
- microsoft windows 11 25h2
- microsoft windows 11 26h1
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History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-33096 is a high vulnerability (CVSS 7.5) in Microsoft Windows 11 Version 23h2, published April 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. No source names a fixed version.