CVE-2026-55124
Medium
Description
Improper validation of specified type of input in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Microsoft 365
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-1287CWE-1287CWE-20Improper input validation
How to fix
Update
- microsoft office_online_server16.0.10417.20175 or later
- microsoft sharepoint_server16.0.19725.20434 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 office_online_server | v < 16.0.10417.20175 | 16.0.10417.20175 |
| microsoft sharepoint_server | v < 16.0.19725.20434, 2016, 2019 | 16.0.19725.20434 |
| microsoft word | 2016 | — |
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