CVE-2026-77485 SQL Server Elevation of Privilege Vulnerability

High 7.0 Published 8 Sep 2026 Updated 14 Oct 2026

An authorized local attacker can exploit a use-after-free flaw in Microsoft SQL Server to elevate privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-77485?

CVE-2026-77485 is a high-severity use after free vulnerability in Microsoft Sql Server 2017, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Use after free in SQL Server allows an authorized attacker to elevate privileges locally.

Weakness: CWE-416

Which versions are affected by CVE-2026-77485?

It affects 4 products.

Products include Microsoft Sql Server 2017, Microsoft Sql Server 2019, Microsoft Sql Server 2022, Microsoft Sql Server 2025.

How do I fix CVE-2026-77485?

No fix has been published for CVE-2026-77485 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-77485 being exploited?

There is no known exploitation of CVE-2026-77485 in the wild and no public exploit code.

All Microsoft Sql Server 2017 vulnerabilities

Sources

Also known as GHSA-969q-58jf-4f5x.