CVE-2026-83722 Microsoft Local Security Authority (LSA) Server Elevation of Privilege Vulnerability
An authorized local attacker can exploit a use-after-free flaw in the LSA Server to elevate privileges on Windows systems.
- 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-2026-83722?
CVE-2026-83722 is a high-severity use after free vulnerability in Microsoft Windows 10 Version 1607, 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
Use after free in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locally.
Which versions are affected by CVE-2026-83722?
How do I fix CVE-2026-83722?
No fix has been published for CVE-2026-83722 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-2026-83722 being exploited?
There is no known exploitation of CVE-2026-83722 in the wild and no public exploit code.
Sources
Also known as GHSA-4mv3-jg43-2mc6.