Description

Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

INFO

Published Date :

2025-12-09T17:55:45.263Z

Last Modified :

2026-02-26T16:56:48.947Z

Source :

microsoft
AFFECTED PRODUCTS

The following products are affected by CVE-2025-64666 vulnerability.

Vendors Products
Microsoft
  • Exchange Server
  • Exchange Server 2016
  • Exchange Server 2019
  • Exchange Server Se
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-64666.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64666 cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact