CVE-2026-21246
Analyzed Analyzed - Analysis Complete
Heap-Based Buffer Overflow in Microsoft Graphics Enables Privilege Escalation

Publication date: 2026-02-10

Last updated on: 2026-02-11

Assigner: Microsoft Corporation

Description
Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-02-10
Last Modified
2026-02-11
Generated
2026-06-16
AI Q&A
2026-02-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21246
EUVD
EUVD-2026-7350
Affected Vendors & Products
Showing 23 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_10_1607 to 10.0.14393.8868 (exc)
microsoft windows_10_1607 to 10.0.14393.8868 (exc)
microsoft windows_10_1809 to 10.0.17763.8389 (exc)
microsoft windows_server_2016 to 10.0.14393.8868 (exc)
microsoft windows_server_2019 to 10.0.17763.8389 (exc)
microsoft windows_server_2022 to 10.0.20348.4711 (exc)
microsoft windows_server_2025 to 10.0.26100.32313 (exc)
microsoft windows_11_24h2 to 10.0.26100.7781 (exc)
microsoft windows_11_24h2 to 10.0.26100.7781 (exc)
microsoft windows_11_23h2 to 10.0.22631.6649 (exc)
microsoft windows_11_23h2 to 10.0.22631.6649 (exc)
microsoft windows_11_25h2 to 10.0.26200.7781 (exc)
microsoft windows_11_25h2 to 10.0.26200.7781 (exc)
microsoft windows_server_2022_23h2 to 10.0.25398.2149 (exc)
microsoft windows_10_22h2 to 10.0.19045.6937 (exc)
microsoft windows_10_22h2 to 10.0.19045.6937 (exc)
microsoft windows_10_22h2 to 10.0.19045.6937 (exc)
microsoft windows_10_21h2 to 10.0.19044.6937 (exc)
microsoft windows_10_21h2 to 10.0.19044.6937 (exc)
microsoft windows_10_21h2 to 10.0.19044.6937 (exc)
microsoft windows_10_1809 to 10.0.17763.8389 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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
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Executive Summary

This vulnerability is a heap-based buffer overflow in the Microsoft Graphics Component.

It allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

An attacker who already has some level of access to the system can exploit this vulnerability to gain higher privileges.

This elevation of privilege can lead to unauthorized actions, potentially compromising the confidentiality, integrity, and availability of the system.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

The vulnerability is a heap-based buffer overflow in the Microsoft Graphics Component that allows local privilege escalation by an authorized attacker.

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

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