Vulnerability · Published Jan 13, 2026 · Assigned by microsoft
CVE-2026-20803Microsoft SQL Server Elevation of Privilege Vulnerability
High 7.2
In plain English
A high-severity missing authentication in Microsoft SQL Server 2022 for x64-based Systems (CU 22) from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)1.2%top 30.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft SQL Server 2022 (GDR) | 16.0.0 – before 16.0.1165.1 |
| Microsoft | Microsoft SQL Server 2022 for x64-based Systems (CU 22) | 16.0.0.0 – before 16.0.4230.2 |
| Microsoft | Microsoft SQL Server 2025 for x64-based Systems (GDR) | 17.0.1050.2 – before 17.0.1050.2 |
Weakness: CWE-306 · Vector: 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
References
- Microsoft SQL Server Elevation of Privilege Vulnerability vendor-advisory, patch