March 3, 2022 · Applied Cybernetics Group
CVE-2016-0099 — Microsoft Windows
known ransomware use
Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability
- Added to KEV
2022-03-03- Federal due date
2022-03-24- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 98.3th percentile (score 0.372, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2016-0099
CISA short description
A privilege escalation vulnerability exists in Microsoft Windows if the Windows Secondary Logon Service fails to properly manage request handles in memory. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator.
Required action
Apply updates per vendor instructions.