High MSRC-CVE-2025-59248 1 CVE

Microsoft Exchange Server Spoofing Vulnerability

Published Oct 14, 2025 · Updated Oct 14, 2025

Vendor: Microsoft

Summary

Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
15.02.2562.029 — https://support.microsoft.com/help/5066366
15.02.1748.039 — https://support.microsoft.com/help/5066367
15.01.2507.061 — https://support.microsoft.com/help/5066369
15.02.1544.036 — https://support.microsoft.com/help/5066368

Vulnerabilities 1

High 7.5

CVE-2025-59248

Microsoft Exchange Server Spoofing Vulnerability

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

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 Microsoft Exchange Server Subscription Edition RTM Microsoft Exchange Server 2019 Cumulative Update 14

Oct 14, 2025

Revision history

2025-10-14 #1
Information published.

References

CVE-2025-59248 Microsoft Exchange Server Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59248
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss