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Remote Code Execution Vulnerability in Microsoft Office

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

Severity Rating: HIGH

Software Affected

Microsoft Office

Overview

A vulnerabilities has been reported in Microsoft Office which could allow an attacker to execute arbitrary code in the context of the current user on the affected system.

Target Audience:

All end-user organizations and individuals using Microsoft Office product.

Risk Assessment:

High risk of remote code execution, unauthorized access, and potential system compromise.

Impact Assessment:

Potential for data theft, execution of malicious code in the context of the current user, and unauthorized actions on the affected system.

Description

Microsoft Office is a widely used productivity suite that includes applications for document creation, data analysis, presentations, and collaboration. It is commonly deployed across enterprise and individual environments.

A remote code execution vulnerability exists in Microsoft Office components due to the deserialization of untrusted data. An authorized attacker could exploit this vulnerability over a network by sending specially crafted data to a vulnerable server.

Successful exploitation could allow the attacker to execute arbitrary code on the affected system, potentially leading to unauthorized access, data manipulation, and compromise of the affected environment.

Solution

Apply appropriate updates as mentioned by the vendor:

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659

Vendor Information

Microsoft

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659

References

 

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659

CVE Name

CVE-2026-45659

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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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