CVE-2016-0099 Microsoft Windows Secondary Logon Service Privilege Escalation
Local attackers can gain elevated privileges by exploiting improper handle processing in the Windows Secondary Logon Service.
- Exploited in the wild
- Since 3 Mar 2022
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2016-0099?
CVE-2016-0099 is a high-severity vulnerability in Microsoft Windows 10 1507, published on 9 Mar 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Secondary Logon Service in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 does not properly process request handles, which allows local users to gain privileges via a crafted application, aka "Secondary Logon Elevation of Privilege Vulnerability."
Weakness: CWE-120
Which versions are affected by CVE-2016-0099?
It affects 7 products.
Products include Microsoft Windows 10 1507, Microsoft Windows 10 1511, Microsoft Windows 7, Microsoft Windows 8.1, Microsoft Windows Server 2008, Microsoft Windows Server 2012 and 1 more.
How do I fix CVE-2016-0099?
No fix has been published for CVE-2016-0099 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 24 Mar 2022.
Is CVE-2016-0099 being exploited?
Yes. Attackers have exploited CVE-2016-0099 in the wild since at least 3 Mar 2022, including in ransomware campaigns.
Public exploit code: 1 Metasploit module, 4 Exploit-DB entries and 1 proofs of concept on GitHub.
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-fq5j-826m-h5wc.