CVE-2019-1215: Microsoft Windows Privilege Escalation Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.
CSIRTS triage
- What
- Microsoft Windows has a vulnerability in ws2ifsl.sys that allows for privilege escalation.
- Who is affected
- Users of Microsoft Windows with the affected Winsock component.
- Urgency
- Remediation is critical due to active exploitation and high severity.
- Action
- Install the latest security updates from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-1215
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2019-1215Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2019-1215 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Microsoft Windows Privilege
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploitedCVE-2026-21533: Microsoft Windows Improper Privilege Management Vulnerabilitycisa-kev · 2026-02-10
- criticalexploitedCVE-2021-43226: Microsoft Windows Privilege Escalation Vulnerabilitycisa-kev · 2025-10-06
- criticalexploitedCVE-2024-49039: Microsoft Windows Task Scheduler Privilege Escalation Vulnerabilitycisa-kev · 2024-11-12
- criticalexploitedCVE-2024-38014: Microsoft Windows Installer Improper Privilege Management Vulnerabilitycisa-kev · 2024-09-10
- criticalexploitedCVE-2024-38107: Microsoft Windows Power Dependency Coordinator Privilege Escalation Vulnerabilitycisa-kev · 2024-08-13
- criticalexploitedCVE-2024-38106: Microsoft Windows Kernel Privilege Escalation Vulnerabilitycisa-kev · 2024-08-13
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