No access to your tenant or devices. Every item links to its source. What this means
CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.
Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
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Explore global source statements, affected packages and advisory history for CVE-2026-45659. The catalog has a separate collection scope from Microsoft release records.
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-45659 · CVE overview and exploitation status