CVE-2026-20803
Microsoft SQL Server Elevation of Privilege Vulnerability
Missing authentication for critical function 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
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft SQL Server Elevation of Privilege Vulnerability
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-20803- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-306
- Updated
- 2026-11-02
EUVDEUVD-2026-2196
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2026-2196- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9429-3r47-rwh9
Missing authentication for critical function in SQL Server allows an authorized attacker to...
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-9429-3r47-rwh9- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-306
- Updated
- 2026-11-02
NVD
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-20803- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-306
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-20803 is a high vulnerability (CVSS 7.2) in Microsoft Sql Server 2022 (gdr), published January 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. No source names a fixed version.