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CVE-2025-59249

Microsoft Exchange Server Elevation of Privilege Vulnerability

Published: Oct 14, 2025Updated: Jun 15, 2026 Sources: CVE List NVD BDUCWE-1390
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.7%
Top 50.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-1390NVD-CWE-noinfo

Affected Products

Microsoft Exchange Server Subscription Edition RTMMicrosoft Corp
On-prem
Operating Systems / windows
Microsoft Exchange Server 2019 Cumulative Update 14Microsoft Corp
On-prem
Operating Systems / windows
Microsoft Exchange Server 2019 Cumulative Update 15Microsoft Corp
On-prem
Operating Systems / windows
Microsoft Exchange Server 2016 Cumulative Update 23Microsoft Corp
On-prem
Operating Systems / windows
Microsoft Exchange Server 2016 Cumulative Update 23Microsoft
On-prem
Operating Systems
microsoft corpcommercialUSOperating Systemsaka microsoft corporation
microsoftcommercialUSOperating Systems
and 5 more affected products View all →

Exploitability

Official Patch Available

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59249
msrc.microsoft.com

Timeline

Published
Oct 14, 2025
Last Updated
Jun 15, 2026

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