Overview

On September 10, NSFOCUS CERT detected that Microsoft released the September Security Update patch, fixing 86 security issues involving widely used products such as Windows, Microsoft Office, Azure, and Microsoft SQL Server, including high-risk vulnerability types such as privilege escalation and remote code execution.

Among the vulnerabilities fixed by Microsoft’s monthly update this month, there are 13 critical vulnerabilities, 72 important vulnerabilities, and 1 moderate vulnerability.

Please update the patch as soon as possible for protection. For a complete list of vulnerabilities, please refer to the appendix.

Reference link: https://msrc.microsoft.com/update-guide/releaseNote/2025-Sep

Key Vulnerabilities

Based on the product popularity and vulnerability importance, this update contains vulnerabilities with greater impact. Relevant users are requested to pay special attention:

Microsoft SharePoint Remote Code Execution Vulnerability (CVE-2025-54897):

Microsoft SharePoint has a remote code execution vulnerability that allows an authenticated remote attacker to execute arbitrary code due to the deserialization of untrusted data in Microsoft Office SharePoint. CVSS score 8.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-54897

Microsoft High Performance Computing (HPC) Package Remote Code Execution Vulnerability (CVE-2025-55232):

A remote code execution vulnerability exists in the Microsoft High Performance Compute Package (HPC), which allows an unauthenticated attacker to achieve remote code execution due to deserialization of untrusted data in the HPC. CVSS score 9.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-55232

Microsoft Office Remote Code Execution Vulnerability (CVE-2025-54910):

A remote code execution vulnerability exists in Microsoft Office. Due to a heap-based buffer overflow in Microsoft Office, an unauthenticated attacker can execute arbitrary code in the user’s context by crafting malicious files that trick users into opening or previewing panes. CVSS score 8.4.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-54910

Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability (CVE-2025-54106):

A remote code execution vulnerability exists in Windows Routing and Remote Access Services (RRAS) that could be exploited by an unauthenticated attacker to trick a user into sending requests to a malicious server due to integer overflow or wraparound issues in Windows Routing and RRAS, thereby executing arbitrary code on the target system. CVSS score 8.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-54106

Windows NTLM Privilege Escalation Vulnerability (CVE-2025-54918):

A privilege escalation vulnerability exists in Windows NTLM, which can be exploited by an authenticated local attacker to gain system SYSTEM privileges due to improper authentication in Windows NTLM. CVSS score 8.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-54918

Windows Kernel Privilege Escalation Vulnerability (CVE-2025-54110):

The Windows kernel has a privilege escalation vulnerability. Due to integer overflow or wraparound issues in the Windows kernel, an attacker can trigger an integer overflow by sending specially crafted input from a sandbox user mode process, thereby achieving privilege escalation or sandbox escape. CVSS score 8.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-54110

Windows SMB Privilege Escalation Vulnerability (CVE-2025-55234):

Windows SMB has a privilege escalation vulnerability. Due to improper configuration of the SMB server, it is vulnerable to relay attacks. An authenticated attacker can use this vulnerability to obtain system permissions for the target user, thereby achieving privilege escalation. CVSS score 8.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-55234

Microsoft SQL Server Privilege Escalation Vulnerability (CVE-2025-55227):

A privilege escalation vulnerability exists in Microsoft SQL Server, where an authenticated attacker could gain system administrator privileges by injecting SQL code when creating a table and running it with elevated privileges due to improper neutralization of special elements used in SQL Server commands. CVSS score 8.8.

Official announcement link: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-55227

Scope of Impact

The following are the affected product versions of some key vulnerabilities. For the scope of products affected by other vulnerabilities, please refer to the official announcement link.

Mitigation

At present, Microsoft has officially released security patches to fix the above vulnerabilities for supported product versions. It is strongly recommended that affected users install patches as soon as possible for protection. The official download link:

https://msrc.microsoft.com/update-guide/releaseNote/2025-Sep

Note: Patch updates for Windows Update may fail due to network problems, computer environment problems, etc. After installing the patch, users should check whether the patch has been successfully updated in time.

Right-click the Windows icon, select “Settings (N)”, select “Update and Security”-“Windows Update”, view the prompt information on this page, or click “View Update History” to view the historical update status.

For updates that have not been successfully installed, you can click the update name to jump to the Microsoft official download page. It is recommended that users click the link on this page and go to the “Microsoft Update Catalog” website to download the independent program package and install it.

Appendix

Statement

This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.

About NSFOCUS

NSFOCUS, a pioneering leader in cybersecurity, is dedicated to safeguarding telecommunications, Internet service providers, hosting providers, and enterprises from sophisticated cyberattacks.

Founded in 2000, NSFOCUS operates globally with over 4000 employees at two headquarters in Beijing, China, and Santa Clara, CA, USA, and over 50 offices worldwide. It has a proven track record of protecting over 25% of the Fortune Global 500 companies, including four of the five largest banks and six of the world’s top ten telecommunications companies.

Leveraging technical prowess and innovation, NSFOCUS delivers a comprehensive suite of security solutions, including the Intelligent Security Operations Platform (ISOP) for modern SOC, DDoS Protection, Continuous Threat Exposure Management (CTEM) Service and Web Application and API Protection (WAAP). All the solutions and services are augmented by the Security Large Language Model (SecLLM), ML, patented algorithms and other cutting-edge research achievements developed by NSFOCUS.

The post Microsoft’s September Security Update High-Risk Vulnerability Notice for Multiple Products appeared first on NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks..

*** This is a Security Bloggers Network syndicated blog from NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. authored by NSFOCUS. Read the original post at: https://nsfocusglobal.com/microsofts-september-security-update-high-risk-vulnerability-notice-for-multiple-products/