CVE-2026-21262 SQL Server Elevation of Privilege Vulnerability
An authorized attacker can elevate privileges over the network due to improper access control in Microsoft SQL Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21262?
CVE-2026-21262 is a high-severity vulnerability in Microsoft Sql Server 2016, published on 10 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper access control in SQL Server allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-284
Which versions are affected by CVE-2026-21262?
It affects 5 products.
Products include Microsoft Sql Server 2016, Microsoft Sql Server 2017, Microsoft Sql Server 2019, Microsoft Sql Server 2022, Microsoft Sql Server 2025.
How do I fix CVE-2026-21262?
No fix has been published for CVE-2026-21262 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21262 being exploited?
There is no known exploitation of CVE-2026-21262 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Sql Server 2016
- CVE-2026-54117 Microsoft SQL Server Remote Code Execution Vulnerability
- CVE-2026-54118 Microsoft SQL Server Remote Code Execution Vulnerability
- CVE-2026-47295 Microsoft SQL Server Elevation of Privilege Vulnerability
- CVE-2026-55002 Microsoft SQL Server Elevation of Privilege Vulnerability
- CVE-2026-40370 SQL Server Remote Code Execution Vulnerability
Sources
Also known as GHSA-wmrr-4347-6m3q.