CVE-2026-45659 — Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability

Description

Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.

How to fix CVE-2026-45659

No package mapping is available — consult the references below for vendor-specific guidance.

Is CVE-2026-45659 being exploited?

Yes — CVE-2026-45659 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.

Affected packages (0)

No package mapping in OSV.