CVE tracker / CVE-2026-109464

CVE-2026-109464

CVE-2026-109464 is the Microsoft Office SharePoint Remote Code Execution Vulnerability. Microsoft rates it Important, CVSS 8.8. It is not in CISA's Known Exploited Vulnerabilities catalog. Published November 10, 2026.

Risk summary

HighRemote Code Execution
8.8
CVSS v3 base
High
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV

Microsoft describes it: “Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.”

How to fix it

Microsoft lists 1 affected product and the update that fixes each:

What Microsoft changed

Details

Weakness
CWE-502: Deserialization of Untrusted Data
Publicly disclosed (Microsoft)
No
Exploited (Microsoft)
No
Known exploited (CISA KEV)
Not listed
Published
November 10, 2026
Last revised
November 10, 2026

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References

Microsoft Security Update Guide NVD CVE record CWE

From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.