CVE-2026-21527

medium Microsoft
CVSS v3 Base Score
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
EPSS Score
0.1%
Exploitation probability in 30 days
Top 78% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Published: February 10, 2026 (93 days ago)
Last Modified: March 13, 2026
Vendor: Microsoft
Source: MITRE

Description

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

CWE

CWE-451

Affected Products

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23Microsoft Microsoft Exchange Server 2019 Cumulative Update 14Microsoft Microsoft Exchange Server 2019 Cumulative Update 15Microsoft Microsoft Exchange Server Subscription Edition RTM

References

🔗 msrc.microsoft.com