CVE-2025-64666

HIGH EPSS 57.9%
Published Dec 9, 20256mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 9, 2025 6mo ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
7.5
Exploitability
1.6
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
57.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-20 Improper Input Validation Validation

Affected Products 38

VendorProductVersionRange
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2016any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server2019any
microsoftexchange_server_subscription_edition* <15.02.2562.035

References 1

  • msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64666
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.