CVE-2026-66302
Undergoing Analysis Undergoing Analysis - In Progress

External Control of File Name in Skype for Business

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description
External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-09-08
Last Modified
2026-09-09
Generated
2026-09-29
AI Q&A
2026-09-10
EPSS Evaluated
2026-09-27
NVD
CVE-2026-66302

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft skype_for_business *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-73 The product allows user input to control or influence paths or file names that are used in filesystem operations.

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Executive Summary

This vulnerability allows an unauthorized attacker to remotely execute code on a system running Skype for Business by manipulating file names or paths. It is caused by improper handling of file operations, enabling attackers to control file paths and execute malicious code over the network.

Impact Analysis

An attacker could exploit this to run arbitrary code on your system, potentially stealing data, installing malware, or taking control of your device. Since it requires no user interaction and works over a network, it poses a high risk to unpatched systems.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection. Organizations may face compliance penalties if exploited due to inadequate security measures.

Mitigation Strategies

Apply the latest security updates from Microsoft for Skype for Business immediately to patch the vulnerability. Monitor Microsoft's security advisories for patches and follow their recommended mitigation steps.

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