CVE-2026-96956
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Stack-based Buffer Overflow in Microsoft SQL Server

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Stack-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges 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-2026-96956

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-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This is a stack-based buffer overflow vulnerability in Microsoft SQL Server. It allows an authorized attacker to elevate their privileges over a network by exploiting a flaw that overwrites memory on the stack.

Impact Analysis

An attacker could gain elevated privileges, potentially leading to unauthorized access, data manipulation, or system compromise. This could result in data breaches, service disruption, or further network infiltration.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations may face legal penalties, fines, or reputational damage if exploited.

Mitigation Strategies

Apply the latest cumulative updates for your SQL Server version immediately. Monitor Microsoft's security advisories for patches and install them as soon as available. Restrict network access to SQL Server instances to trusted sources only.

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