CVE-2026-20876
Unknown
Unknown - Not Provided
Heap-Based Buffer Overflow in Windows VBS Enclave Elevates Privileges
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
Description
Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_virtualization_based_security | * |
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
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a heap-based buffer overflow in the Windows Virtualization-Based Security (VBS) Enclave. It allows an authorized attacker to elevate their privileges locally on the affected system. [1]
How can this vulnerability impact me? :
An attacker who is already authorized on the system can exploit this vulnerability to gain higher privileges than they should have, potentially leading to full control over the system and compromising its confidentiality, integrity, and availability. [1]
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