CVE-2026-66306

Undergoing Analysis Undergoing Analysis - In Progress

Information Disclosure in Skype for Business

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: Microsoft Corporation

Description

Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-08

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-66306

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	skype_for_business	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-209	The product generates an error message that includes sensitive information about its environment, users, or associated data.

Attack-Flow Graph

Executive Summary

This vulnerability in Skype for Business generates error messages that contain sensitive information. An unauthorized attacker could exploit this to disclose confidential data over a network.

Impact Analysis

An attacker could access sensitive information through error messages, potentially leading to data breaches or unauthorized disclosure of confidential details.

Compliance Impact

This vulnerability could lead to unauthorized disclosure of personal or sensitive data, which may violate GDPR and HIPAA compliance requirements for data protection and privacy.

Mitigation Strategies

Apply the latest security updates from Microsoft for Skype for Business to address the information disclosure issue. Monitor network traffic for unusual error message patterns that may indicate exploitation attempts.

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