CVE-2026-42897
Microsoft Exchange Server Spoofing Vulnerability
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | microsoft |
| Product | microsoft exchange server 2016 cumulative update 23 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | May 14, 2026 |
| Last Updated | Jun 19, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft Exchange Server 2016 Cumulative Update 23
15.01.0.0 < 15.01.2507.069
Microsoft / Microsoft Exchange Server 2019 Cumulative Update 14
15.02.0.0 < 15.02.1544.041
Microsoft / Microsoft Exchange Server 2019 Cumulative Update 15
15.02.0.0 < 15.02.1748.046
Microsoft / Microsoft Exchange Server Subscription Edition RTM
15.02.0.0 < 15.02.2562.043