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

Vulnerability report for CVE-2026-96956, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-13

Last updated on: 2026-11-02

Assigner: Microsoft Corporation

Description

Stack-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-10-13
Last Modified
2026-11-02
Generated
2026-11-08
AI Q&A
2026-10-14
EPSS Evaluated
2026-11-07
NVD

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
microsoft sql_server_2017 From 14.0.1000.169 (inc) to 14.0.2140.2 (exc)
microsoft sql_server_2017 From 14.0.3006.16 (inc) to 14.0.3560.2 (exc)
microsoft sql_server_2019 From 15.0.2000.5 (inc) to 15.0.2200.2 (exc)
microsoft sql_server_2019 From 15.0.4003.23 (inc) to 15.0.4500.2 (exc)
microsoft sql_server_2022 From 16.0.4003.1 (inc) to 16.0.4305.5 (exc)
microsoft sql_server_2022 From 16.0.1000.6 (inc) to 16.0.1210.3 (exc)
microsoft sql_server_2025 From 17.0.1000.7 (inc) to 17.0.1145.4 (exc)
microsoft sql_server_2025 From 17.0.4006.2 (inc) to 17.0.5015.4 (exc)

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).

Attack-Flow Graph

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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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