CVE-2016-0099
Published 2016-03-09 · Updated 2026-06-17 · Source secure@microsoft.com
Summary
CVE-2016-0099 is a high-severity (CVSS 7.8) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on March 3, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 24, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →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."
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — Windows
Name: Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability
Date added: 2022-03-03 · Due: 2022-03-24
Required action: Apply updates per vendor instructions.
References
- http://www.securityfocus.com/bid/84034
- http://www.securitytracker.com/id/1035210
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-032
- https://www.exploit-db.com/exploits/39574/
- https://www.exploit-db.com/exploits/39719/
- https://www.exploit-db.com/exploits/39809/
- https://www.exploit-db.com/exploits/40107/
- http://www.securityfocus.com/bid/84034