Status: UPDATED | Advisory ID: CVE-2026-78510
| CVE | CVE-2026-78510 |
| CVSS Score / Version | 8.4 (High) / CVSS v3.1 |
| Updated | 2026-09-25 |
| CVSS Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CVSS Prose | attack vector is local; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | see table below |
| Classified as | CWE-122 (Heap-based Buffer Overflow) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Microsoft | microsoft_365 | ||
| Microsoft | office_2016 | ||
| Microsoft | Microsoft 365 Apps for Enterprise | ||
| Microsoft | Microsoft Office 2016 | ||
| Microsoft | Microsoft Office 2019 | ||
| Microsoft | Microsoft Office 365 for Mac | ||
| Microsoft | Microsoft Office LTSC 2021 | ||
| Microsoft | Microsoft Office LTSC 2024 | ||
| Microsoft | Microsoft Office LTSC for Mac 2021 | ||
| Microsoft | Microsoft Office LTSC for Mac 2024 |
| Subsystems | General OT |
| Sectors | Multiple |
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.