CVE-2026-45659

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Weaknesses (CWE)

CWE-502

Threats tracking this CVE

• Microsoft SharePoint Authenticated RCE via Deserialization of Untrusted Data (CVE-2026-45659) — HIGH

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659

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