CVE-2026-88083

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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 unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

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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-2026-88083

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Microsoft	SQL Server 2022 (CU 26) *
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 (CU8) *
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

KEV

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

Executive Summary

This is a stack-based buffer overflow in Microsoft SQL Server. An attacker can exploit it by sending specially crafted data over a network to trigger the overflow. This may allow them to execute arbitrary code on the affected system with the privileges of the SQL Server process.

Impact Analysis

If exploited, this vulnerability could lead to unauthorized code execution on your SQL Server. This might result in data theft, data corruption, or complete system compromise. Attackers could gain control over databases, leading to potential loss of sensitive information.

Compliance Impact

This vulnerability could lead to unauthorized access or exposure of sensitive data, violating compliance requirements like GDPR (data protection) or HIPAA (health information). Organizations may face legal penalties, fines, or reputational damage if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for affected SQL Server versions. Disable remote access to SQL Server if not required. Monitor network traffic for unusual SQL Server protocol activity.

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