CVE-2026-70189 Microsoft SQL Server Remote Code Execution Vulnerability
An authorized attacker can execute code locally via a heap-based buffer overflow in Microsoft SQL Server.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70189?
CVE-2026-70189 is a medium-severity memory corruption vulnerability in Microsoft SQL Server 2017 (GDR), published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code locally.
Weakness: CWE-122
Which versions are affected by CVE-2026-70189?
How do I fix CVE-2026-70189?
No fix has been published for CVE-2026-70189 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-2026-70189 being exploited?
There is no known exploitation of CVE-2026-70189 in the wild and no public exploit code.
Sources
Also known as GHSA-55cq-2mv2-57p8.