CVE-2026-67378 Microsoft SQL Server Remote Code Execution Vulnerability

Critical 9.0 Published 8 Sep 2026 Updated 14 Oct 2026

An untrusted pointer dereference in Microsoft SQL Server allows remote attackers to execute arbitrary code over the network.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-67378?

CVE-2026-67378 is a critical vulnerability in Microsoft Sql Server 2019, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Untrusted pointer dereference in SQL Server allows an unauthorized attacker to execute code over a network.

Weakness: CWE-822

Which versions are affected by CVE-2026-67378?

It affects 3 products.

Products include Microsoft Sql Server 2019, Microsoft Sql Server 2022, Microsoft Sql Server 2025.

How do I fix CVE-2026-67378?

No fix has been published for CVE-2026-67378 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-67378 being exploited?

There is no known exploitation of CVE-2026-67378 in the wild and no public exploit code.

All Microsoft Sql Server 2019 vulnerabilities

Sources

Also known as GHSA-4259-xrjq-w65p.