high7.8
CVE-2026-42831
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Impact
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | 365 Copilot | before 16.0.19822.20190 |
| Microsoft | Office | Version 2024 |
| Microsoft | Office Long Term Servicing Channel | Version 2021 |