CVE-2026-45659
Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability
8.8
CVSS 3.1
2.7 %
EPSS (current)
2026-07-01
KEV addition
Yes
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Microsoft / SharePoint Server
Published: 2026-05-22 · Due (CISA): 2026-07-04
CWE: CWE-502 · EU list: no
Exploit references (metadata only)
No public exploit references recorded.