CVE-2026-70569 Windows Spaceport.sys Elevation of Privilege Vulnerability

High 7.8 Published 8 Sep 2026 Updated 14 Oct 2026

An out-of-bounds read in Windows Spaceport.sys allows local attackers 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-2026-70569?

CVE-2026-70569 is a high-severity memory corruption vulnerability in Microsoft Windows 11 23h2, 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

Out-of-bounds read in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.

Weakness: CWE-125

Which versions are affected by CVE-2026-70569?

It affects 6 products.

Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2022, Microsoft Windows Server 2025.

How do I fix CVE-2026-70569?

No fix has been published for CVE-2026-70569 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-2026-70569 being exploited?

There is no known exploitation of CVE-2026-70569 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-2gp8-chr8-qjrm.