CVE-2026-42897

Published: May 14, 2026Modified: Jun 17, 2026CISA KEV

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: NVD

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.

Affected (40)

Products: Microsoft: Exchange Server, Exchange Server Subscription Edition

Microsoft

2 products

Exchange Server

Exchange Server Subscription Edition

Configuration A

40 vulnerable

Vulnerable Software	Affected Versions
Microsoft Exchange Server	Version 2016
Microsoft Exchange Server	Version 2016 cumulative_update_10
Microsoft Exchange Server	Version 2016 cumulative_update_11
Microsoft Exchange Server	Version 2016 cumulative_update_12
Microsoft Exchange Server	Version 2016 cumulative_update_13
Microsoft Exchange Server	Version 2016 cumulative_update_14
Microsoft Exchange Server	Version 2016 cumulative_update_15
Microsoft Exchange Server	Version 2016 cumulative_update_16
Microsoft Exchange Server	Version 2016 cumulative_update_17
Microsoft Exchange Server	Version 2016 cumulative_update_18
Microsoft Exchange Server	Version 2016 cumulative_update_19
Microsoft Exchange Server	Version 2016 cumulative_update_1
Microsoft Exchange Server	Version 2016 cumulative_update_20
Microsoft Exchange Server	Version 2016 cumulative_update_21
Microsoft Exchange Server	Version 2016 cumulative_update_22
Microsoft Exchange Server	Version 2016 cumulative_update_23
Microsoft Exchange Server	Version 2016 cumulative_update_2
Microsoft Exchange Server	Version 2016 cumulative_update_3
Microsoft Exchange Server	Version 2016 cumulative_update_4
Microsoft Exchange Server	Version 2016 cumulative_update_5
Microsoft Exchange Server	Version 2016 cumulative_update_6
Microsoft Exchange Server	Version 2016 cumulative_update_7
Microsoft Exchange Server	Version 2016 cumulative_update_8
Microsoft Exchange Server	Version 2016 cumulative_update_9
Microsoft Exchange Server	Version 2019
Microsoft Exchange Server	Version 2019 cumulative_update_10
Microsoft Exchange Server	Version 2019 cumulative_update_11
Microsoft Exchange Server	Version 2019 cumulative_update_12
Microsoft Exchange Server	Version 2019 cumulative_update_13
Microsoft Exchange Server	Version 2019 cumulative_update_14
Microsoft Exchange Server	Version 2019 cumulative_update_1
Microsoft Exchange Server	Version 2019 cumulative_update_2
Microsoft Exchange Server	Version 2019 cumulative_update_3
Microsoft Exchange Server	Version 2019 cumulative_update_4
Microsoft Exchange Server	Version 2019 cumulative_update_5
Microsoft Exchange Server	Version 2019 cumulative_update_6
Microsoft Exchange Server	Version 2019 cumulative_update_7
Microsoft Exchange Server	Version 2019 cumulative_update_8
Microsoft Exchange Server	Version 2019 cumulative_update_9
Microsoft Exchange Server Subscription Edition	Before 15.02.2562.043

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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.

References (2)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897

Source: secure@microsoft.com

MitigationVendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42897

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

Timeline

No history available yet.