What is CVE-2026-42897?

CVE-2026-42897 is a security advisory published by Microsoft Security Response Center (MSRC) with Spoofing severity. Microsoft Exchange Server Spoofing Vulnerability

Which CVE IDs does CVE-2026-42897 cover?

CVE-2026-42897 covers the following CVE IDs: CVE-2026-42897. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-42897?

CVE-2026-42897 has a CVSS v3 base score of 8.1, published by Microsoft Security Response Center (MSRC).

CVE-2026-42897SpoofingCVSS 8.1

Microsoft Exchange Server Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-42897 →

📋 Description

<p>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.</p>