CVE-2026-42897

HIGH8.1

CISA KEV

Published 2026-05-14 · Updated 2026-05-15 · Source secure@microsoft.com

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE-79

CISA Known-Exploited Vulnerability

Product: Microsoft — Microsoft

Name: Microsoft Exchange Server Cross-Site Scripting Vulnerability

Date added: 2026-05-15 · Due: 2026-05-29

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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