CVE-2025-64666

EUVD-2025-202236
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoftCNA
7.5 HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Base Score
CVSS 3.x
EPSS Score
Percentile: 21%
Affected Products (NVD)
VendorProductVersion
microsoftexchange_server
𝑥
< 15.02.2562.035
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1748.42
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2507.63
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1544.37
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64666