Microsoft Patches Multiple Windows Elevation of Privilege Flaws
Microsoft disclosed and patched several Windows elevation of privilege vulnerabilities affecting core platform components, including Windows App Package Installer, Windows Installer, and Windows Authentication. The referenced issues are tracked as CVE-2025-21275, CVE-2025-33075, CVE-2025-32714, and CVE-2025-55701, indicating that attackers who already have some level of access could potentially exploit weaknesses in trusted Windows services to gain higher privileges on affected systems.
The vulnerabilities span software installation and authentication mechanisms that are widely present in enterprise environments, increasing their relevance for defenders managing Windows fleets. Organizations should prioritize applying Microsoft security updates for affected systems and review exposure across endpoints and servers where installer workflows or Windows authentication components are in use, as elevation of privilege flaws can be chained with other compromises to expand attacker control.
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How this story unfolded
3 events from the most recent confirmed update back to the earliest known activity.
Microsoft publishes advisory for CVE-2025-55701
Microsoft added CVE-2025-55701, a Windows Authentication elevation of privilege vulnerability, to its Security Update Guide.
Microsoft publishes advisories for CVE-2025-33075 and CVE-2025-32714
Microsoft published Security Update Guide entries for CVE-2025-33075 and CVE-2025-32714, both described as Windows Installer elevation of privilege vulnerabilities.
Microsoft publishes advisory for CVE-2025-21275
Microsoft added CVE-2025-21275, a Windows App Package Installer elevation of privilege vulnerability, to its Security Update Guide.
Sources
4 references tracked. Mallory keeps watching after this page renders.
CVE-2025-55701 - Security Update Guide - Microsoft - Windows Authentication Elevation of Privilege Vulnerability
msrc.microsoft.com
Open sourceCVE-2025-33075 - Security Update Guide - Microsoft - Windows Installer Elevation of Privilege Vulnerability
msrc.microsoft.com
Open sourceCVE-2025-32714 - Security Update Guide - Microsoft - Windows Installer Elevation of Privilege Vulnerability
msrc.microsoft.com
Open sourceCVE-2025-21275 - Security Update Guide - Microsoft - Windows App Package Installer Elevation of Privilege Vulnerability
msrc.microsoft.com
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Microsoft discloses multiple elevation-of-privilege flaws across Windows and developer tools
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May 25, 2026
Microsoft Patched Multiple Windows Elevation of Privilege Flaws Across Core Components
Microsoft published security updates for several **Windows elevation of privilege** vulnerabilities affecting core components including **Win32k** (`CVE-2024-30082`, `CVE-2023-36743`), **Microsoft COM for Windows** (`CVE-2025-21281`), the **Microsoft Graphics Component** (`CVE-2025-49708`), and the **Windows Search Service** (`CVE-2026-27909`). The advisories indicate that successful exploitation could allow an attacker to gain higher privileges on a targeted Windows system, increasing the risk of broader compromise after initial access. The affected components span user interface, inter-process communication, graphics, and search functionality, showing continued exposure in widely deployed parts of the Windows platform. Microsoft issued entries for each CVE through its Security Update Guide, including both vulnerability and advisory records for `CVE-2025-21281`, and organizations should prioritize patching these flaws as part of routine Windows security maintenance because privilege escalation bugs are commonly chained with other exploits to obtain **SYSTEM**-level or administrative control.
May 25, 2026
Microsoft discloses multiple Windows elevation-of-privilege flaws across kernel and core components
Microsoft published security advisories for a series of **Windows elevation-of-privilege** vulnerabilities affecting the **Windows Kernel**, **File Explorer**, **Windows Management Service**, **Windows UI XAML Phone DatePickerFlyout**, **Windows Graphics Component**, **Windows Storage**, and the **DirectX Graphics Kernel**. The referenced flaws include `CVE-2026-26132`, `CVE-2025-62565`, `CVE-2025-54103`, `CVE-2025-54111`, `CVE-2025-55693`, `CVE-2024-38249`, `CVE-2025-62573`, `CVE-2024-38248`, and `CVE-2025-55678`. The disclosures indicate a broad patching effort spanning core operating system subsystems and user-facing Windows components, with repeated exposure in privileged areas such as the kernel and graphics stack. For defenders, the concentration of elevation-of-privilege issues across these components raises the risk that attackers could chain local access or code execution with privilege escalation to gain **SYSTEM-level** or otherwise expanded rights on affected Windows systems, making prompt validation and deployment of Microsoft updates a priority.
May 25, 2026