CVE-2026-21259
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to elevate privileges locally.
| Software | From | Fixed in |
|---|---|---|
| microsoft / excel | 2016 | 2016.x |
| microsoft / office | 2019 | 2019.x |
| microsoft / office_long_term_servicing_channel | 2021 | 2021.x |
| microsoft / office_long_term_servicing_channel | 2024 | 2024.x |
| microsoft / office_online_server | - | 16.0.10417.20097 |
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