What is CVE-2026-105013?

CVE-2026-105013 is a high-severity vulnerability in Microsoft Sharepoint Server Subscription Edition, classified under Deserialization of Untrusted Data. CVSS score: 7.4/10. Published 2026-10-13.

How severe is CVE-2026-105013?

High severity. CVSS v3 base score is 7.4 out of 10.

Deserialization in Microsoft Sharepoint Server Subscription Edition

CVE-2026-105013

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

Vulnerability class: Insecure Deserialization

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Sharepoint Server Subscription Edition

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

Microsoft Office SharePoint Remote Code Execution Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-105013?: CVE-2026-105013 is a high-severity vulnerability in Microsoft Sharepoint Server Subscription Edition, classified under Deserialization of Untrusted Data. CVSS score: 7.4/10. Published 2026-10-13.
How severe is CVE-2026-105013?: High severity. CVSS v3 base score is 7.4 out of 10.