CVE-2026-42897

EUVD-2026-30343
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 41.81%
Affected Products (NVD)
VendorProductVersion
microsoftexchange_server
𝑥
< 15.02.2562.043
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2507.69
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1544.41
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1748.46
𝑥
= Vulnerable software versions
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42897