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CVE-2019-1069

KEVRansomware UseMicrosoft Task Scheduler Privilege Escalation Vulnerability

A privilege escalation vulnerability exists in the way the Task Scheduler Service validates certain file operations.

An elevation of privilege vulnerability exists in the way the Task Scheduler Service validates certain file operations. An attacker who successfully exploited the vulnerability could gain elevated privileges on a victim system. To exploit the vulnerability, an attacker would require unprivileged code execution on a victim system. The security update addresses the vulnerability by correctly validating file operations.

CVSS 3.1 vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
PublishedJun 12, 2019
Last modifiedAug 12, 2026
Added to KEVMar 15, 2022
Remediation dueApr 5, 2022
    80
    Risk assessment · Critical

    Actively exploited and used by ransomware crews. Patch immediately.

    Exploitation
    Confirmed in the wild (CISA KEV)
    Federal remediation deadline
    Overdue by 1665 days
    Ransomware
    Used in known ransomware campaigns
    CVSS
    7.8 HIGH
    EPSS (30-day exploit probability)
    6.1% · top 7% of all CVEs
    Weakness
    CWE-59
    1. 1.Apply updates per vendor instructions.
    2. 2.Treat as emergency change: patch or isolate internet-facing instances first.
    3. 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
    4. 4.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.

    Assessment is derived automatically from the live signals above; verify against your own asset inventory.