CVE-2025-64667

Name: CVE-2025-64667
Creator: NVD / NIST
Published: 2025-12-09T18:16:06.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2025-64667 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.82%

52.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-451

Affected Software

Vendor	Product	Versions
Microsoft	Exchange Server	2016
Microsoft	Exchange Server	2019
Microsoft	Exchange Server Subscription Edition	< 15.02.2562.035

References

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

Timeline

Published: Dec 9, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-64667?

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

How severe is CVE-2025-64667?

CVE-2025-64667 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2025-64667?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-64667?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST