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Multiple Vulnerabilities in Microsoft Products

Indian – Computer Emergency Response Team (https://www.cert-in.org.in)

Severity Rating: High

Software Affected

Microsoft Windows

Microsoft Office

Microsoft Dynamics

SQL Server

Extended Security Updates (ESU) for legacy Microsoft products

Azure

Apps

Developer Tools

Open Source Software

Server Software

Overview

Multiple vulnerabilities have been reported in Microsoft products that could allow an attacker to gain elevated privileges, obtain sensitive information, execute arbitrary code remotely, bypass security restrictions, conduct spoofing attacks, perform tampering of data or system processes, or cause denial-of-service (DoS) conditions.

Target Audience:

Individuals and IT administrators, security teams responsible for maintaining and updating Microsoft products.

Risk Assessment:

Risk of remote code execution, system instability or sensitive information disclosure.

Impact Assessment:

Potential compromise of system, exfiltration of data, ransomware attacks or system crashes.

Description

Multiple vulnerabilities have been reported in Microsoft products that could allow an attacker to gain elevated privileges, obtain sensitive information, execute arbitrary code remotely, bypass security restrictions, conduct spoofing attacks, perform tampering of data or system processes, or cause denial-of-service (DoS) conditions.

CVE-2026-81963: This vulnerability exists in the Microsoft Windows Update Stack due to improper link resolution before file access. An authorized attacker could exploit this vulnerability locally to elevate privileges. Successful exploitation could result in elevated privileges on the affected system.

CVE-2026-85880: This vulnerability exists in Microsoft Windows Advanced Local Procedure Call (ALPC) due to a heap-based buffer overflow. An authorized attacker could exploit this vulnerability locally to elevate privileges. Successful exploitation could result in elevated privileges on the affected system.

Note: These vulnerabilities are being exploited in the wild. Users are advised to apply patches immediately.

For complete list of affected products, CVEs, workarounds and solutions, refer to the Microsoft security updates.

https://msrc.microsoft.com/update-guide/releaseNote/2026-Sep

Solution

Apply appropriate security updates as mentioned in  

https://msrc.microsoft.com/update-guide/releaseNote/2026-Sep

Vendor Information

Microsoft

https://msrc.microsoft.com/update-guide/

References

 

https://msrc.microsoft.com/update-guide/releaseNote/2026-Sep

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Thanks and Regards,

CERT-In

Incident Response Help Desk

e-mail: incident@cert-in.org.in

Phone: +91-11-22902657

Toll Free Number: 1800-11-4949

Toll Free Fax : 1800-11-6969

Web: http://www.cert-in.org.in

PGP Fingerprint: A768 083E 4475 5725 B81A A379 2156 C0C0 B620 D0B4

PGP Key information:

https://www.cert-in.org.in/s2cMainServlet?pageid=CONTACTUS

Postal address:

Indian Computer Emergency Response Team (CERT-In)

Ministry of Electronics and Information Technology

Government of India

Electronics Niketan

6, C.G.O. Complex

New Delhi-110 003

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