CVE-2025-64666

—

CVSS 3.1

7.5 high

EPSS

1%p61

Published

Dec 9, 2025 (Dec 9, 2025)

Modified

Jun 17, 2026

Description

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

Vendors: microsoft
Products: exchange server, exchange server subscription edition
Weakness: CWE-20
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (1.0%)

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