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Vulnerability details

CVE-2026-66818

Microsoft SQL Server

Microsoft SQL Server Elevation of Privilege Vulnerability

CVSS 3.1
8.8High

Official description

Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.

CVSS scores

ScoreVersionSourceVector
8.8High 3.1 CVEProject cvelistV5 (CNA) (microsoft) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products

VendorProductVersionsSource
Microsoft Microsoft SQL Server 2017 (CU 31) 14.0.0 ≤ v < 14.0.3550.4 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2017 (GDR) 14.0.0 ≤ v < 14.0.2130.4 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2019 (CU 32) 15.0.0.0 ≤ v < 15.0.4490.9 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2019 (GDR) 15.0.0 ≤ v < 15.0.2190.7 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2022 (CU 26) 16.0.0.0 ≤ v < 16.0.4275.2 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2022 (GDR) 16.0.0 ≤ v < 16.0.1200.5 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2025 (CU8) 17.0.0.0 ≤ v < 17.0.4085.5 CVEProject cvelistV5 (CNA)
Microsoft Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0.1050.2 ≤ v < 17.0.1135.8 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-09-08
Last updated
2026-10-31
State
Published
Assigner (CNA)
microsoft

Exploit prediction (EPSS)

0.77%
Probability of exploitation in 30 days
56.1%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-269
    Improper Privilege Management