Description
User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21527
Scores
CVSS v3
6.5
EPSS
0.0946
EPSS Percentile
94.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1286
CWE-345
CWE-451
Status
published
Products (8)
microsoft/exchange_server
2016 cumulative_update_23
microsoft/exchange_server
2019 cumulative_update_14 (2 CPE variants)
microsoft/exchange_server
< 15.02.2562.037
microsoft/exchange_server_subscription_edition
< 15.02.2562.037
Microsoft/Microsoft Exchange Server 2016 Cumulative Update 23
15.01.0.0 - 15.01.2507.066
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 14
15.02.0.0 - 15.02.1544.039
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 15
15.02.0.0 - 15.02.1748.043
Microsoft/Microsoft Exchange Server Subscription Edition RTM
15.02.0.0 - 15.02.2562.037
Published
Feb 10, 2026
Tracked Since
Feb 18, 2026