Buffer Over-Read in Microsoft SQL Server

Publication date: 2026-09-08

Last updated on: 2026-09-15

Assigner: Microsoft Corporation

Description

Buffer over-read in SQL Server allows an authorized attacker to disclose information over a network.

CVSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-15

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-67390

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sql_server_2022	to 16.0.1200.5 (exc)
microsoft	sql_server_2022	From 16.0.4003.1 (inc) to 16.0.4275.2 (exc)
microsoft	sql_server_2017	to 14.0.2130.4 (exc)
microsoft	sql_server_2017	From 14.0.3006.16 (inc) to 14.0.3550.4 (exc)
microsoft	sql_server_2019	to 15.0.2190.7 (exc)
microsoft	sql_server_2019	From 15.0.4003.23 (inc) to 15.0.4490.9 (exc)
microsoft	sql_server_2025	to 17.0.1135.8 (exc)
microsoft	sql_server_2025	From 17.0.4006.2 (inc) to 17.0.4085.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This is a buffer over-read vulnerability in Microsoft SQL Server. It allows an authorized attacker to read beyond the intended memory buffer, potentially accessing sensitive data that should not be visible. The issue occurs over a network, meaning it can be exploited remotely if the attacker has valid credentials.

Impact Analysis

An attacker could exploit this to disclose confidential information stored in the database, such as user credentials, personal data, or other sensitive records. This could lead to further attacks like identity theft or unauthorized access to systems.

Mitigation Strategies

Apply the latest security updates from Microsoft for SQL Server to patch the buffer over-read vulnerability. Ensure network access controls limit unauthorized access and monitor for unusual data disclosure patterns.

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