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OpenAdvisories
High · 7.5 CVE-2025-59248 EUVD-2025-34275GHSA-4fp2-p8gm-qx95

Microsoft Exchange Server Spoofing Vulnerability

Published Oct 14, 2025 · Updated Feb 22, 2026 · Assigned by microsoft

Description

Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Affected products

VendorProductAffectedFixed
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0.0 – < 15.01.2507.061 15.01.2507.061
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0 – < 15.02.1544.036 15.02.1544.036
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0 – < 15.02.1748.039 15.02.1748.039
Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 – < 15.02.2562.029 15.02.2562.029

Advisories 3

References