Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited the vulnerability?
The attacker would be able to take over the mailboxes of all Exchange users, attackers can send emails, read emails, download attachments.
How could an attacker exploit this vulnerability?
An attacker would first have to compromise with a user account who is member of an admin group to run the required code.
Security updates
15.01.2507.061 — https://support.microsoft.com/help/5066369
15.02.1544.036 — https://support.microsoft.com/help/5066368
15.02.1748.039 — https://support.microsoft.com/help/5066367
15.02.2562.029 — https://support.microsoft.com/help/5066366
Vulnerabilities 1
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High 8.8
Microsoft Exchange Server Elevation of Privilege Vulnerability
Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Revision history
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#1
Information published.
References
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CVE-2025-59249 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59249
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss