SQL Injection in Microsoft SQL Server 2017 (Cu 31)
CVE-2026-66819
Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an authorized attacker to elevate privileges over a network.
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (62.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Microsoft SQL Server 2017 (Cu 31)
- Microsoft SQL Server 2017 (Gdr)
- Microsoft SQL Server 2019 (Cu 32)
- Microsoft SQL Server 2019 (Gdr)
- Microsoft SQL Server 2022 (Cu 26)
- Microsoft SQL Server 2022 (Gdr)
- Microsoft SQL Server 2025 (Cu8)
- Microsoft SQL Server 2025 For X64-Based Systems (Gdr)
- Microsoft SQL Server 2017
- Microsoft SQL Server 2019
Weakness classification (CWE)
References
- Microsoft SQL Server Elevation of Privilege Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-66819?
- CVE-2026-66819 is a high-severity vulnerability in Microsoft SQL Server 2017 (Cu 31), classified under SQL Injection. CVSS score: 8.8/10. Published 2026-09-08.
- How severe is CVE-2026-66819?
- High severity. CVSS v3 base score is 8.8 out of 10.