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Microsoft's September 2025 Patch Tuesday addresses 86 vulnerabilities, including two publicly disclosed zero-days and several critical remote code execution and privilege escalation flaws. No vulnerabilities are known to be actively exploited, but several are rated as 'Exploitation More Likely,' notably in Windows NTLM, SMB, NTFS, and the High Performance Compute Pack. Security teams are advised to prioritize patching critical and zero-day vulnerabilities, especially those affecting core Windows authentication and file-sharing protocols.
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Microsoft released its October 2025 Patch Tuesday security updates, addressing a total of 172 vulnerabilities across its product suite, including six zero-day vulnerabilities. The update marks a significant milestone as it is the final free security update for Windows 10, which has now reached its end of support, requiring users and enterprises to enroll in Extended Security Updates (ESU) for continued protection. Among the vulnerabilities patched, eight were rated as 'Critical,' with five being remote code execution flaws and three classified as elevation of privilege vulnerabilities. The breakdown of vulnerabilities includes 80 elevation of privilege, 11 security feature bypass, 31 remote code execution, 28 information disclosure, 11 denial of service, and 10 spoofing vulnerabilities. Notably, two of the zero-day vulnerabilities were publicly disclosed prior to the patch, affecting Windows SMB Server and Microsoft SQL Server, while three zero-days were actively exploited in the wild. One of the exploited zero-days, CVE-2025-24990, involved the Agere Modem driver, which was being abused to gain administrative privileges, prompting Microsoft to remove the vulnerable driver from supported Windows operating systems. The Patch Tuesday release also included updates for a wide range of Microsoft products and components, such as .NET, Visual Studio, Active Directory Federation Services, Microsoft Office suite, Azure services, Windows authentication methods, and various Windows system components. The update was described as the largest Patch Tuesday release to date, with 167 CVEs directly patched according to some sources, excluding additional vulnerabilities in Chromium, MITRE, GitHub, CERT/CC, and cloud services that were addressed separately. The security updates did not include fixes for vulnerabilities in Microsoft Edge, Azure, or Mariner that were released earlier in the month. Microsoft emphasized the importance of these updates, especially for organizations still running Windows 10, as the cessation of free support increases the risk of exposure to unpatched vulnerabilities. The comprehensive nature of the update reflects the ongoing complexity and breadth of the Microsoft ecosystem, with critical patches spanning from core Windows components to cloud and developer tools. Security professionals are advised to prioritize the deployment of these patches, particularly those addressing actively exploited zero-days and critical remote code execution vulnerabilities. The update also highlights the evolving threat landscape, with attackers increasingly targeting third-party drivers and core system components to escalate privileges. Organizations are encouraged to review the full list of patched vulnerabilities and assess their exposure, especially in light of the end of support for Windows 10. The October 2025 Patch Tuesday underscores the necessity of timely patch management and the challenges posed by legacy systems in maintaining a secure enterprise environment.
Jun 29, 2026
Microsoft released its December 2025 Patch Tuesday updates, addressing 57 security vulnerabilities across Windows 10, Windows 11, Windows Server, Office, and related services. Among these, three zero-day vulnerabilities were highlighted: CVE-2025-62221, an actively exploited privilege escalation flaw in the Windows Cloud Files Mini Filter Driver; CVE-2025-64671, a remote code execution vulnerability in GitHub Copilot for JetBrains; and CVE-2025-54100, a remote code execution issue in Windows PowerShell. The update also introduced a new warning in PowerShell to alert users when the `Invoke-WebRequest` command fetches web pages without safe parameters, aiming to prevent script-based attacks that exploit unsafe web content retrieval. Throughout 2025, Microsoft addressed a total of 1,130 CVEs via Patch Tuesday releases, with 41 zero-day vulnerabilities patched, including 24 that were exploited in the wild. Elevation of Privilege and Remote Code Execution vulnerabilities made up the majority of the year's patches, reflecting ongoing attacker focus on these vectors. The December update continues Microsoft's trend of prioritizing critical and important vulnerabilities, reinforcing the need for organizations to promptly apply security updates to mitigate active threats.
Jun 29, 2026
Microsoft released security updates addressing 63 vulnerabilities as part of its November 2025 Patch Tuesday, including five rated as critical and one zero-day vulnerability actively exploited in the wild. The zero-day, tracked as CVE-2025-62215, is a Windows Kernel elevation of privilege flaw that allows a local, authenticated attacker to gain higher privileges due to a race condition. Other critical vulnerabilities include remote code execution issues in GDI+, Microsoft Office, and Visual Studio, as well as an elevation of privilege vulnerability in the DirectX Graphics Kernel. The GDI+ vulnerability (CVE-2025-60724) is particularly notable for its high CVSS score and the potential for exploitation via specially crafted metafiles, which could be triggered through documents or web services without user interaction. Security researchers note that while the number of vulnerabilities is significant, the overall risk profile is considered moderate, with no "Patch Now" emergencies aside from the actively exploited zero-day. The update also marks the first extended security update (ESU) for Windows 10, with Microsoft urging organizations still using the unsupported OS to upgrade or enroll in the ESU program. The vulnerabilities span a wide range of Microsoft products and services, including Azure, Dynamics 365, Visual Studio, and various Windows components, emphasizing the need for comprehensive patch management across enterprise environments.
Jun 29, 2026