CVE-2026-26110
High
Description
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
SeverityHigh
CVSS8.4
Exploit probability—
Product
Microsoft Office
PublishedMar 10, 2026
First seenMar 10, 2026
Weakness typeCWE-843CWE-843
How to fix
Update
- microsoft 365_copilot16.0.19822.20000 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft office | 2016, 2019 | — |
| microsoft 365_apps | No range specified | — |
| microsoft 365_copilot | v < 16.0.19822.20000 | 16.0.19822.20000 |
| microsoft office_long_term_servicing_channel | 2021, 2024 | — |
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