CVE-2026-45458
High
Description
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
SeverityHigh
CVSS8.4
Exploit probability—
Product
Microsoft 365
PublishedJun 9, 2026
First seenJun 9, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- microsoft sharepoint_server16.0.19725.20384 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft microsoft_365 | No range specified | — |
| microsoft 365_apps | No range specified | — |
| microsoft office_2019 | No range specified | — |
| microsoft office_2021 | No range specified | — |
| microsoft office_2024 | No range specified | — |
| microsoft sharepoint_server | v < 16.0.19725.20384, 2016, 2019 | 16.0.19725.20384 |
| microsoft word | 2016 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.