CVE-2026-58545

Analyzed Analyzed - Analysis Complete

Improper Access Control in Windows Kernel

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Improper access control in Windows Kernel allows an authorized attacker to bypass a security feature locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-22

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-58545

EUVD

EUVD-2026-44298

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_server_2016	to 10.0.14393.9339 (exc)
microsoft	windows_server_2019	to 10.0.17763.9020 (exc)
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper access control issue in the Windows Kernel. An authorized attacker can locally bypass a security feature due to incorrect permissions or controls.

Detection Guidance

Detection requires monitoring for unauthorized bypass attempts of Windows Kernel security features. Check Windows Event Logs for unusual kernel-level access patterns or failed integrity checks. Use commands like 'wevtutil qe System /q:*[System[EventID=4103]]' to review security audit logs for kernel modifications.

Impact Analysis

An attacker with local access could bypass security features, potentially gaining unauthorized access to sensitive data or system functions. This may lead to data theft or system compromise.

Compliance Impact

Bypassing security features may violate compliance requirements for data protection. Organizations could face penalties for failing to maintain adequate safeguards under GDPR or HIPAA.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update to patch the kernel vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

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