--- title: "CVE-2019-0859: Microsoft Windows vulnerability | CubePath" description: "An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation…" language: en source: https://cubepath.com/security/cve/CVE-2019-0859 --- # CVE-2019-0859: Microsoft Windows vulnerability | CubePath ## Description An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0803. Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-0859) ## Key data ### CVSS 3.1 High 7.8 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.04186 (4.2% probability) Percentile 91.0% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Microsoft Win32k Privilege Escalation Vulnerability Added to the catalog Nov 3, 2021 Federal due date May 3, 2022 Ransomware campaigns Known use ### CISA assessment as of Feb 7, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ## Affected products Products listed in the CVE record, as the CNA published them. - Microsoft Windows - affected: 7 for 32-bit Systems Service Pack 1 - affected: 7 for x64-based Systems Service Pack 1 - affected: 8.1 for 32-bit systems - affected: 8.1 for x64-based systems - affected: RT 8.1 - affected: 10 for 32-bit Systems - affected: 10 for x64-based Systems - affected: 10 Version 1607 for 32-bit Systems - affected: 10 Version 1607 for x64-based Systems - affected: 10 Version 1703 for 32-bit Systems - affected: 10 Version 1703 for x64-based Systems - affected: 10 Version 1709 for 32-bit Systems - affected: 10 Version 1709 for x64-based Systems - affected: 10 Version 1803 for 32-bit Systems - affected: 10 Version 1803 for x64-based Systems - affected: 10 Version 1803 for ARM64-based Systems - affected: 10 Version 1809 for 32-bit Systems - affected: 10 Version 1809 for x64-based Systems - affected: 10 Version 1809 for ARM64-based Systems - affected: 10 Version 1709 for ARM64-based Systems - Microsoft Windows Server - affected: 2008 R2 for x64-based Systems Service Pack 1 (Core installation) - affected: 2008 R2 for Itanium-Based Systems Service Pack 1 - affected: 2008 R2 for x64-based Systems Service Pack 1 - affected: 2008 for 32-bit Systems Service Pack 2 (Core installation) - affected: 2012 - affected: 2012 (Core installation) - affected: 2012 R2 - affected: 2012 R2 (Core installation) - affected: 2016 - affected: 2016 (Core installation) - affected: version 1709 (Core Installation) - affected: version 1803 (Core Installation) - affected: 2019 - affected: 2019 (Core installation) - affected: 2008 for Itanium-Based Systems Service Pack 2 - affected: 2008 for 32-bit Systems Service Pack 2 - affected: 2008 for x64-based Systems Service Pack 2 - affected: 2008 for x64-based Systems Service Pack 2 (Core installation) ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [portal.msrc.microsoft.com/en-US/security-guidance/advisory/…](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0859) ## Timeline 1. ID reserved Nov 26, 2018 2. Record published Apr 9, 2019 3. Added to CISA KEV Nov 3, 2021 4. Record last updated Oct 21, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:35 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)