PublicCVE

CVE-2026-55009

HIGH7.8Insecure deserialization

Description

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

CVSS breakdown

CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
E
Unchanged
RL
O
RC
Changed
Updated 28m ago · 8 sources