CVE-2026-65674

Analyzed Analyzed - Analysis Complete

Microsoft SQL Server Deserialization Code Execution Vulnerability

Publication date: 2026-10-13

Last updated on: 2026-11-02

Assigner: Microsoft Corporation

Description

Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.

CVSS 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

CVE-2026-65674

Affected Vendors & Products

Vendor	Product	Version / Range
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

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

This vulnerability involves deserialization of untrusted data in SQL Server. An authorized attacker can exploit this to execute arbitrary code over a network.

Impact Analysis

An attacker could gain control over SQL Server, leading to data breaches, unauthorized access, or system compromise. This may result in data theft, manipulation, or service disruption.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Non-compliance may result in legal penalties and reputational damage.

Mitigation Strategies

Apply the latest cumulative updates for affected SQL Server versions to patch the deserialization flaw. Ensure network-level controls restrict unauthorized access to SQL Server ports and services.

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