CVE-2026-42897

MediumCVSS 6.1/10Known exploited (CISA KEV)Last modified Oct 26, 2026

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.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

VendorProductVersions
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 23>= 15.01.0.0, < 15.01.2507.069
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 14>= 15.02.0.0, < 15.02.1544.041
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 15>= 15.02.0.0, < 15.02.1748.046
MicrosoftMicrosoft Exchange Server Subscription Edition RTM>= 15.02.0.0, < 15.02.2562.043

References

Timeline

Published
May 14, 2026
Last modified
Oct 26, 2026
Added to CISA KEV
May 15, 2026
NVD status
Analyzed

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CVE-2026-42897: Medium severity, CVSS 6.1 | Vulnix