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.
Exploits (1)
References (2)
Core 2
Core References
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42897
Vendor Advisory vendor-advisory
patch
Microsoft Exchange Server Spoofing Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897
Scores
CVSS v3
8.1
EPSS
0.1234
EPSS Percentile
94.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
active
Automatable
no
Technical Impact
total
Details
CISA KEV
2026-05-15
VulnCheck KEV
2026-05-14
ENISA EUVD
EUVD-2026-30343
CWE
CWE-79
Status
published
Products (7)
microsoft/exchange_server
microsoft/exchange_server
2016 (24 CPE variants)
microsoft/exchange_server
2019 (15 CPE variants)
Microsoft/Microsoft Exchange Server 2016 Cumulative Update 23
-
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 14
-
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 15
-
Microsoft/Microsoft Exchange Server Subscription Edition RTM
-
Published
May 14, 2026
KEV Added
May 15, 2026
Tracked Since
May 14, 2026