CVE-2026-55009
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
2.5%
84.1th percentile
CISA KEV
Not listed
Weakness / dates
CWE-502
Published 2026-07-14 · modified 2026-07-24
Description
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.