CVE-2025-64667 | BDVDB-2026-304949 Detail

MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 23

Description#

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

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-451 User Interface (UI) Misrepresentation of Critical Information

References#

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64667

Exploit#

No public exploit known

History#

Version 12025-12-09Record published in the CVE List.
Version 22026-04-16Most recent update recorded in the CVE List.

Published

Published: 2025-12-09
Last modified: 2026-04-16

Vendor information

Vendor: Microsoft
Product: Microsoft Exchange Server 2016 Cumulative Update 23

All Microsoft vulnerabilities

Score

5.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 56.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 15.01.0.0 and < 15.01.2507.063
Fixed
15.01.2507.063

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.3 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).