CVE-2026-55005

high Microsoft
CVSS v3 Base Score
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.7%
Exploitation probability in 30 days
Top 52% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: July 14, 2026 (54 days ago)
Last Modified: July 24, 2026
Vendor: Microsoft
Source: NVD

Description

Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

CWE

CWE-122

Affected Products

microsoft exchange servermicrosoft exchange server subscription edition

References

🔗 msrc.microsoft.com