CVE-2026-96940
Received Received - Intake

Weak Authorization in Microsoft Exchange Server

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: Microsoft Corporation

Description
Weak authorization in Microsoft Exchange Server allows an authenticated attacker to elevate privileges over a network.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-03
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-96940
EUVD
EUVD-2026-91771

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1390 The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.

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Executive Summary

This vulnerability is a weak authorization issue in Microsoft Exchange Server that allows an authenticated attacker to gain higher privileges than intended over a network.

Impact Analysis

An attacker could exploit this to gain elevated access to sensitive data or system functions, potentially leading to unauthorized data access, modification, or disruption of services.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements under GDPR, HIPAA, or other regulations that mandate strict access controls and data protection.

Mitigation Strategies

Apply the latest security updates from Microsoft for Exchange Server as soon as possible to address the weak authorization issue.

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