Description
Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Affected products
microsoft: 365 apps; microsoft: office; microsoft: office long term servicing channel; microsoft: word
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40364 Vendor Advisory
Metrics
- CVSS 3.1
-
8.4
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 4% percentile: 92 · as of 14 November 2026
- CWE
- CWE-122CWE-843CWE-908
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.