Status: UPDATED | Advisory ID: CVE-2026-62870
| CVE | CVE-2026-62870 |
| CVSS Score / Version | 8.8 (High) / CVSS v3.1 |
| Updated | 2026-09-20 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | Microsoft Microsoft 365 Apps, Microsoft Excel, Microsoft Office 2019, Microsoft Office 2021, and Microsoft Office 2024 |
| Classified as | CWE-416 (Use After Free) |
| Exploitation prediction (EPSS) | 0.82% probability of exploitation in the next 30 days (55% percentile) -- FIRST.org's EPSS model. |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps | ||
| Microsoft | Excel | ||
| Microsoft | Office 2019 | ||
| Microsoft | Office 2021 | ||
| Microsoft | Office 2024 |
| Subsystems | General OT |
| Sectors | Multiple |
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.