Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability

HIGH 7.8EXPLOITED (CISA KEV)CVE-2016-0099 · Published 09/03/2016 · updated 17/06/2026

Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/03/2022. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

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."

References

securityfocus.com/bid/84034 · Broken Link
securitytracker.com/id/1035210 · Broken Link
docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-032 · Patch
exploit-db.com/exploits/39574 · Exploit
exploit-db.com/exploits/39719 · Exploit
exploit-db.com/exploits/39809 · Exploit
exploit-db.com/exploits/40107 · Exploit
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2016-0099

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