CVE-2026-55007

high Microsoft
CVSS v3 Base Score
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: September 8, 2026 (2 days ago)
Last Modified: September 9, 2026
Vendor: Microsoft
Source: MITRE

Description

Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

CWE

CWE-415

Affected Products

Microsoft Microsoft Exchange Server 2019 Cumulative Update 14Microsoft Microsoft Exchange Server 2019 Cumulative Update 15Microsoft Microsoft Exchange Server Subscription Edition RTM

References

🔗 msrc.microsoft.com