Security November 2026 CVE-2026-109499
Access of resource using incompatible type ('type confusion') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Severity Important
CVSS base score 8.8
Impact Remote Code Execution
Exploitation detected No known exploitation (MSRC assessment)
Exploitability Exploitation Less Likely
Publicly disclosed No (MSRC assessment)
EPSS · 30-day forecast No EPSS score collected
Customer action Required: follow the MSRC remediation guidance More details
CVSS 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
Public detection template No Nuclei template is listed in the current collected catalog
Component Microsoft Office SharePoint
Weakness CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
Issued by Microsoft
Last revised 10 Nov 2026 CVSS 3.1 base metrics Red raises the risk · green lowers it
Attack vector NetworkAV:N
Attack complexity LowAC:L
Privileges required LowPR:L
User interaction NoneUI:N
Scope UnchangedS:U
Confidentiality HighC:H
Integrity HighI:H
Availability HighA:H Source. This summary comes from MSRC's public CVRF document for November 2026. If the MSRC page is blocked in your browser, the NVD and CVE.org records carry the same identifier. None of this says whether your devices are affected.
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