CVE-2026-83945 Microsoft SQL Server Remote Code Execution Vulnerability
An authorized attacker can execute arbitrary code remotely via a heap-based buffer overflow in Microsoft SQL Server.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83945?
CVE-2026-83945 is a medium-severity memory corruption vulnerability in Microsoft SQL Server 2022 (GDR), published on 13 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
Weakness: CWE-122
Which versions are affected by CVE-2026-83945?
How do I fix CVE-2026-83945?
No fix has been published for CVE-2026-83945 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-83945 being exploited?
There is no known exploitation of CVE-2026-83945 in the wild and no public exploit code.
Sources
Also known as GHSA-5hvg-r2mf-rvx6.