CVE-2026-66814
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Insufficient Privilege Escalation in SQL Server
Vulnerability report for CVE-2026-66814, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-08
Last updated on: 2026-09-16
Assigner: Microsoft Corporation
Description
Description
Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
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-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. |
