CVE-2026-33096

Received Received - Intake

Out-of-Bounds Read in Windows HTTP.sys Causes Remote DoS

Publication date: 2026-04-14

Last updated on: 2026-04-17

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-14

Last Modified

2026-04-17

Generated

2026-07-06

AI Q&A

2026-04-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-33096

EUVD

EUVD-2026-22617

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_23h2	to 10.0.22631.6936 (exc)
microsoft	windows_11_23h2	to 10.0.22631.6936 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8246 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8246 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8246 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8246 (exc)
microsoft	windows_11_26h1	to 10.0.28000.1836 (exc)
microsoft	windows_11_26h1	to 10.0.28000.1836 (exc)
microsoft	windows_server_2022	to 10.0.20348.5020 (exc)
microsoft	windows_server_2022_23h2	to 10.0.25398.2274 (exc)
microsoft	windows_server_2025	to 10.0.26100.32690 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read in the Windows HTTP.sys component. It allows an unauthorized attacker to cause a denial of service (DoS) over a network by exploiting this flaw.

Impact Analysis

The impact of this vulnerability is that an attacker can cause a denial of service condition remotely without any privileges or user interaction. This means your system or service relying on Windows HTTP.sys could become unavailable or unresponsive due to this attack.

Mitigation Strategies

The vulnerability allows an unauthorized attacker to cause a denial of service over a network via an out-of-bounds read in Windows HTTP.sys.

To mitigate this vulnerability, it is recommended to apply the security updates provided by Microsoft as soon as possible.

Compliance Impact

The vulnerability allows an unauthorized attacker to cause a denial of service over a network by exploiting an out-of-bounds read in Windows HTTP.sys.

While this can impact availability, the provided information does not specify any direct effects on confidentiality or integrity of data, which are critical for compliance with standards like GDPR or HIPAA.

Therefore, based on the available data, this vulnerability primarily affects service availability but does not explicitly indicate a compliance impact related to data protection regulations.

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