Microsoft has released its scheduled November 2025 Patch Tuesday updates, addressing a total of 63 security flaws across its product ecosystem. The security release includes fixes for vulnerabilities in Microsoft Windows, Office, Azure, and other software. Of the 63 vulnerabilities, five are classified as Critical, while the remaining 58 are rated as Important in severity.

Key Vulnerabilities and Public Disclosures

The most significant vulnerability addressed in this month’s release is CVE-2025-62215, a critical Remote Code Execution (RCE) vulnerability in Microsoft Exchange Server. This flaw holds a CVSSv3.1 score of 9.8, reflecting its severity. Successful exploitation of CVE-2025-62215 allows an unauthenticated, remote attacker to execute arbitrary code on affected Exchange servers. The vulnerability requires no user interaction for an attacker to leverage it. System administrators are advised to prioritize the patch for this particular CVE.

In addition to the critical flaws, Microsoft noted that one of the vulnerabilities patched this month was publicly disclosed before the update’s release. At the time of the announcement, none of the 63 CVEs were listed as actively exploited in the wild.

Patches Across the Microsoft Ecosystem

The November 2025 security updates encompass a wide range of Microsoft products. The patches resolve various types of security issues, including Elevation of Privilege, Information Disclosure, and Denial of Service vulnerabilities. The affected product families include:

• Microsoft Windows and Windows Components
• Microsoft Office and Office Components
• Azure
• .NET Core and Visual Studio
• Microsoft Exchange Server
• Windows Defender

The fixes for these products are delivered through standard update channels, including Windows Update. Organizations are encouraged to review the detailed release notes from Microsoft to assess the impact of these vulnerabilities on their specific environments and to apply the necessary updates promptly to mitigate risk.

Source: https://www.tenable.com/blog/microsofts-november-2025-patch-tuesday-addresses-63-cves-cve-2025-62215