CVE-2025-64666: Microsoft Exchange Server Elevation of Privilege Vulnerability
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Other sources
Microsoft Exchange Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.02.1748.042Patch KB5071875 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.02.2562.035Patch KB5071876 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.02.1544.037Patch KB5071874 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.01.2507.063Patch KB5071873
Event History
Frequently Asked Questions
What is the severity of CVE-2025-64666?
CVE-2025-64666 has a severity rating that allows an authorized attacker to elevate privileges within Microsoft Exchange Server.
How do I fix CVE-2025-64666?
To fix CVE-2025-64666, apply the latest security updates provided by Microsoft for your version of Exchange Server.
Which versions of Microsoft Exchange Server are affected by CVE-2025-64666?
CVE-2025-64666 affects Microsoft Exchange Server 2016, 2019, and Subscription Edition RTM.
Can CVE-2025-64666 be exploited remotely?
Yes, CVE-2025-64666 can be exploited over a network, allowing an attacker to elevate privileges.
What type of vulnerability is CVE-2025-64666?
CVE-2025-64666 is classified as an elevation of privilege vulnerability due to improper input validation.