CVE-2025-64666

HighCVSS 7.5/10Last modified Oct 14, 2026

Description

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

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-20

Affected software

No affected versions have been published.

Timeline

Published
Dec 9, 2025
Last modified
Oct 14, 2026
NVD status
Analyzed

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CVE-2025-64666: High severity, CVSS 7.5 | Vulnix