CVE-2026-94512
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Heap-based Buffer Overflow in Microsoft SQL Server

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-16
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-94512

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
Microsoft Microsoft SQL Server 2017 (GDR) 14.0.0
Microsoft Microsoft SQL Server 2017 for x64-based Systems (CU31) 14.0.3006.16
Microsoft Microsoft SQL Server 2019 (GDR) 15.0.0
Microsoft Microsoft SQL Server 2019 for x64-based Systems (CU32) 15.0.4003.23
Microsoft Microsoft SQL Server 2022 (GDR) 16.0.0
Microsoft Microsoft SQL Server 2022 for x64-based Systems (CU27) 16.0.4003.1
Microsoft Microsoft SQL Server 2025 for x64-based Systems (CU9) 17.0.4006.2
Microsoft Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0.1050.2

Helpful Resources

Exploitability

CWE
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KEV
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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().

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Executive Summary

This is a heap-based buffer overflow in Microsoft SQL Server. It allows an authorized attacker to execute arbitrary code remotely over a network by exploiting a flaw in memory handling.

Impact Analysis

An attacker could gain control of the SQL Server, steal or manipulate data, install malware, or disrupt services. This could lead to data breaches, unauthorized access, or system downtime.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy). Organizations may face fines, legal penalties, and reputational damage.

Mitigation Strategies

Apply the latest cumulative update for your SQL Server version immediately. Disable network access to SQL Server if not required. Monitor network traffic for unusual SQL Server connections.

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