CVE-2026-59132

Analyzed Analyzed - Analysis Complete

Null pointer dereference in Windows TCP/IP

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-59132

EUVD

EUVD-2026-56312

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_server_2016	to 10.0.14393.9418 (exc)
microsoft	windows_server_2019	to 10.0.17763.9115 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

This vulnerability is a null pointer dereference in Windows TCP/IP. It allows an unauthorized attacker to cause a denial of service over a network by exploiting this flaw.

Detection Guidance

This vulnerability is a null pointer dereference in Windows TCP/IP causing denial of service. Detection typically requires monitoring for network service disruptions or crashes in Windows systems. Check Windows Event Viewer for TCP/IP-related errors or system crashes. Use network monitoring tools to detect unusual traffic patterns or service outages.

Impact Analysis

The impact is a denial of service, meaning network services may become unavailable. This could disrupt connectivity or access to network resources.

Compliance Impact

This vulnerability causes a denial of service over a network, which could disrupt critical services. While it does not directly affect data confidentiality or integrity, prolonged service disruption may impact compliance with availability requirements in standards like GDPR and HIPAA.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows TCP/IP null pointer dereference vulnerability. Monitor network traffic for unusual patterns indicating denial of service attempts.

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