CVE-2025-59259 Windows Local Session Manager (LSM) Denial of Service Vulnerability
An authorized attacker can cause a denial of service in Windows Local Session Manager by exploiting improper input validation over the network.
- 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-2025-59259?
CVE-2025-59259 is a medium-severity denial of service vulnerability in Microsoft Windows 10 1507, published on 14 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.
Weakness: CWE-1287
Which versions are affected by CVE-2025-59259?
It affects 15 products.
Products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 22h2 and 9 more.
How do I fix CVE-2025-59259?
No fix has been published for CVE-2025-59259 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-59259 being exploited?
There is no known exploitation of CVE-2025-59259 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1507
- CVE-2017-8543 Microsoft Windows Search Remote Code Execution
- CVE-2025-33053 Microsoft Windows External Control of File Name or Path
- CVE-2025-33073 Microsoft Windows SMB Client Improper Access Control
- CVE-2024-49039 Microsoft Windows Task Scheduler Privilege Escalation
- CVE-2024-43461 Microsoft Windows MSHTML Platform Spoofing
Sources
Also known as GHSA-36q9-26rq-9p9m.