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Remote Code Execution Vulnerability in Microsoft Windows LNK 

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

Severity Rating: HIGH

Software Affected

Microsoft Windows

Overview

A vulnerability has been reported in Microsoft Windows, which may allow a remote attacker to execute arbitrary code on the targeted vulnerable system.

Target Audience:

All end-user organizations and individuals using the affected Windows installations.

Risk Assessment:

High risk of arbitrary code execution, privilege escalation, and persistence.

Impact Assessment:

Potential for full system compromise, sensitive information disclosure, and deployment of malware.

Description

The vulnerability exists in Windows due to improper handling of .lnk shortcut files. An attacker could exploit this vulnerability by getting a user to open a malicious .lnk file, typically shared inside an archive file. The flaw allows the shortcut to hide malicious command-line arguments, leading the user to unknowingly execute harmful code.

Successful exploitation could allow a remote attacker to execute arbitrary code on the targeted system.

Solution

 

https://msrc.microsoft.com/update-guide/advisory/ADV25258226

Vendor Information

Microsoft

https://msrc.microsoft.com/update-guide/advisory/ADV25258226

References

 

https://www.zerodayinitiative.com/advisories/ZDI-25-148/

CVE Name

CVE-2025-9491

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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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