CVE-2026-85886 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
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85886?
CVE-2026-85886 is a high-severity memory corruption vulnerability in Microsoft SQL Server 2017 (GDR), published on 13 Oct 2026. Any signed-in user can exploit it over the network, 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-2026-85886?
How do I fix CVE-2026-85886?
No fix has been published for CVE-2026-85886 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-2026-85886 being exploited?
There is no known exploitation of CVE-2026-85886 in the wild and no public exploit code.
Sources
Also known as GHSA-xqcr-mvpq-grr9.