CVE-2026-61359

Undergoing Analysis Undergoing Analysis - In Progress

Heap-based Buffer Overflow in Windows Storage

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows Storage allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-08-31

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-61359

EUVD

EUVD-2026-56615

Affected Vendors & Products

Vendor	Product	Version / Range
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_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-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in Windows Storage. It allows an authorized attacker with local access to elevate their privileges on the system by exploiting a flaw in memory handling.

Detection Guidance

This vulnerability involves a heap-based buffer overflow in Windows Storage. Detection typically requires analyzing system logs for crashes or unusual behavior in storage-related processes. Use Event Viewer to check for application or system crashes linked to storage services. Monitor for memory corruption errors in logs.

Impact Analysis

An attacker could gain higher-level permissions on your system, allowing them to install programs, view or delete data, or create new accounts with full user rights. This could lead to complete system compromise if exploited.

Compliance Impact

This vulnerability allows local privilege escalation through a heap-based buffer overflow in Windows Storage. Such attacks could enable unauthorized access to sensitive data or system functions, potentially violating confidentiality requirements in GDPR or HIPAA.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the heap-based buffer overflow in Windows Storage. Monitor Microsoft's update guide for the specific patch.

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