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CVE-2026-21527

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CVE-2026-21527

Published: Feb 10, 2026

Modified: May 11, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

Description

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

VendorProductVersions

Microsoft

Microsoft Exchange Server 2016 Cumulative Update 23

affected
15.01.0.0 - < 15.01.2507.066

Microsoft

Microsoft Exchange Server 2019 Cumulative Update 14

affected
15.02.0.0 - < 15.02.1544.039

Microsoft

Microsoft Exchange Server 2019 Cumulative Update 15

affected
15.02.0.0 - < 15.02.1748.043

Microsoft

Microsoft Exchange Server Subscription Edition RTM

affected
15.02.0.0 - < 15.02.2562.037

Weaknesses (CWE)

CWE-451
CWE-345
CWE-1286

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

References

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