CVE-2026-66820
SQL Server Elevation of Privilege Vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
SQL Server Elevation of Privilege Vulnerability
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.
- Record
CVE-2026-66820- CVSS 3.1
- 8.8 High
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 - Weakness
- CWE-89
- Updated
- 2026-11-02
EUVDEUVD-2026-73378
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.
- Record
EUVD-2026-73378- CVSS 3.1
- 8.8 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-wccj-w6f2-7r8j
Improper neutralization of special elements used in an sql command ('sql injection') in SQL...
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.
- Record
GHSA-wccj-w6f2-7r8j- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-66820- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
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
- microsoft sql server 2022
- microsoft sql server 2025
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-66820 is a high vulnerability (CVSS 8.8) in Microsoft Sql Server 2017 (cu 31), published September 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.99%, the 62nd percentile. No source names a fixed version.