CVE-2025-62556
High
Description
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Excel
PublishedDec 9, 2025
First seenDec 9, 2025
Weakness typeCWE-822CWE-822
How to fix
Update
- microsoft office_online_server16.0.10417.20075 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft excel | 2016 | — |
| microsoft 365_apps | No range specified | — |
| microsoft office | 2019 | — |
| microsoft office_long_term_servicing_channel | 2021, 2024 | — |
| microsoft office_online_server | v < 16.0.10417.20075 | 16.0.10417.20075 |
Check your version
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