November 3, 2021 · Applied Cybernetics Group
CVE-2019-1215 — Microsoft Windows
known ransomware use
Microsoft Windows Privilege Escalation Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 90.2th percentile (score 0.052, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2019-1215
CISA short description
Microsoft Windows contains an unspecified vulnerability due to the way ws2ifsl.sys (Winsock) handles objects in memory, allowing for privilege escalation. Successful exploitation allows an attacker to execute code with elevated privileges.
Required action
Apply updates per vendor instructions.