CVE-2026-66818— Microsoft SQL Server Elevation of Privilege Vulnerability
Quick assessment
Affected
Microsoft Microsoft SQL Server 2017 (CU 31)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
SQL Server 中的权限管理不当，允许经过身份验证的攻击者通过网络提升权限。
Possible ATT&CK Techniques 1 AI
T1078 · Valid AccountsAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft SQL Server 2017 (CU 31) | 14.0.0< 14.0.3550.4 |
affected |
| Microsoft | Microsoft SQL Server 2017 (GDR) | 14.0.0< 14.0.2130.4 |
affected |
| Microsoft | Microsoft SQL Server 2019 (CU 32) | 15.0.0.0< 15.0.4490.9 |
affected |
| Microsoft | Microsoft SQL Server 2019 (GDR) | 15.0.0< 15.0.2190.7 |
affected |
| Microsoft | Microsoft SQL Server 2022 (CU 26) | 16.0.0.0< 16.0.4275.2 |
affected |
| Microsoft | Microsoft SQL Server 2022 (GDR) | 16.0.0< 16.0.1200.5 |
affected |
| Microsoft | Microsoft SQL Server 2025 (CU8) | 17.0.0.0< 17.0.4085.5 |
affected |
| Microsoft | Microsoft SQL Server 2025 for x64-based Systems (GDR) | 17.0.1050.2< 17.0.1135.8 |
affected |
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I. Basic Information for CVE-2026-66818
Vulnerability Information
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Vulnerability Title
Microsoft SQL Server Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Microsoft SQL Server 2017 (CU 31) | 14.0.0 ~ 14.0.3550.4 | - |
|
| Microsoft | Microsoft SQL Server 2017 (GDR) | 14.0.0 ~ 14.0.2130.4 | - |
|
| Microsoft | Microsoft SQL Server 2019 (CU 32) | 15.0.0.0 ~ 15.0.4490.9 | - |
|
| Microsoft | Microsoft SQL Server 2019 (GDR) | 15.0.0 ~ 15.0.2190.7 | - |
|
| Microsoft | Microsoft SQL Server 2022 (CU 26) | 16.0.0.0 ~ 16.0.4275.2 | - |
|
| Microsoft | Microsoft SQL Server 2022 (GDR) | 16.0.0 ~ 16.0.1200.5 | - |
|
| Microsoft | Microsoft SQL Server 2025 (CU8) | 17.0.0.0 ~ 17.0.4085.5 | - |
|
| Microsoft | Microsoft SQL Server 2025 for x64-based Systems (GDR) | 17.0.1050.2 ~ 17.0.1135.8 | - |
|
II. Public POCs for CVE-2026-66818
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-66818 (1)
Same Patch Batch · Microsoft · 2026-09-08 · 966 CVEs total
| CVE-2026-83941 | 9.9 CRITICAL | Entra ID Elevation of Privilege Vulnerability |
| CVE-2026-69408 | 9.8 CRITICAL | Microsoft Windows Media Foundation Remote Code Execution Vulnerability |
| CVE-2026-69819 | 9.8 CRITICAL | RPC Runtime Library Remote Code Execution Vulnerability |
| CVE-2026-73025 | 9.8 CRITICAL | Windows iSCSI Security Feature Bypass Vulnerability |
| CVE-2026-72982 | 9.8 CRITICAL | Windows Netlogon Remote Code Execution Vulnerability |
| CVE-2026-69276 | 9.8 CRITICAL | Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability |
| CVE-2026-73010 | 9.8 CRITICAL | Microsoft Failover Cluster Remote Code Execution Vulnerability |
| CVE-2026-69595 | 9.8 CRITICAL | Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability |
| CVE-2026-72983 | 9.8 CRITICAL | Internet Connection Sharing (ICS) Remote Code Execution Vulnerability |
| CVE-2026-73009 | 9.8 CRITICAL | Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability |
| CVE-2026-69525 | 9.8 CRITICAL | Remote Desktop Services Remote Code Execution Vulnerability |
| CVE-2026-69491 | 9.8 CRITICAL | Microsoft DirectMusic Remote Code Execution Vulnerability |
| CVE-2026-69910 | 9.8 CRITICAL | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2026-69730 | 9.8 CRITICAL | Windows DNS Server Remote Code Execution Vulnerability |
| CVE-2026-78509 | 9.8 CRITICAL | Microsoft Office Outlook Remote Code Execution Vulnerability |
| CVE-2026-69463 | 9.8 CRITICAL | Windows NTFS Remote Code Execution Vulnerability |
| CVE-2026-78510 | 9.8 CRITICAL | Microsoft Word Remote Code Execution Vulnerability |
| CVE-2026-69590 | 9.8 CRITICAL | Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability |
| CVE-2026-69496 | 9.8 CRITICAL | Windows Compressed Folder Remote Code Execution Vulnerability |
| CVE-2026-72979 | 9.8 CRITICAL | Windows DHCP Server Remote Code Execution Vulnerability |
Showing top 20 of 966 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-66818
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