CVE-2026-45500
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Stored XSS in Microsoft Exchange Server

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft exchange_server *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a type of cross-site scripting (XSS) found in Microsoft Exchange Server. It occurs because the server improperly neutralizes input during web page generation, which means that malicious input is not correctly handled or sanitized.

As a result, an unauthorized attacker can exploit this flaw to perform spoofing attacks over a network, potentially deceiving users or systems by presenting false information.

Impact Analysis

This vulnerability can impact you by allowing an attacker to perform spoofing attacks, which may lead to users being tricked into believing false information or interacting with malicious content.

Such spoofing can compromise the integrity and trustworthiness of communications or data presented through Microsoft Exchange Server, potentially leading to further security issues.

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