CVE-2026-77480
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Insufficient Privilege Escalation in SQL Server

Vulnerability report for CVE-2026-77480, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-08

Last updated on: 2026-09-15

Assigner: Microsoft Corporation

Description

Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-09-08
Last Modified
2026-09-15
Generated
2026-09-29
AI Q&A
2026-09-10
EPSS Evaluated
2026-09-27
NVD

Affected Vendors & Products

Showing 8 associated CPEs
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
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KEV
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CWE ID Description
CWE-1220 The product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. However, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets.

Attack-Flow Graph

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Executive Summary

This vulnerability is an elevation of privilege issue in Microsoft SQL Server caused by insufficient granularity in access control. An authorized attacker can exploit it over a network to gain higher privileges than intended.

Impact Analysis

An attacker could exploit this to gain elevated access to sensitive data or system functions in SQL Server, potentially leading to unauthorized data manipulation, disclosure, or further network compromise.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements such as GDPR or HIPAA, which mandate strict access controls and data protection measures.

Mitigation Strategies

Apply the latest security updates from Microsoft for SQL Server as soon as possible to address the insufficient access control issue.

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EPSS Chart