CVE-2026-50522
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
85.4%
99.7th percentile
CISA KEV
Listed
Added 2026-07-22 · patch by 2026-07-25
Weakness / dates
CWE-502
Published 2026-07-14 · modified 2026-07-23
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.