CVE-2026-45659
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
76.1%
99.5th percentile
CISA KEV
Listed
Added 2026-07-01 · patch by 2026-07-04
Weakness / dates
CWE-502
Published 2026-05-22 · modified 2026-07-23
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.