CVE-2026-78509
critical · 9.8Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
9.8
CVSS
1.0%
EPSS (exploit prob.)
62nd
EPSS percentile
2026-09-08
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-122
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | 365_apps | all versions |
| microsoft | 365_apps | all versions |
| microsoft | microsoft_365 | all versions |
| microsoft | office_2019 | all versions |
| microsoft | office_2019 | all versions |
| microsoft | office_2021 | all versions |
| microsoft | office_2021 | all versions |
| microsoft | office_2021 | all versions |
| microsoft | office_2024 | all versions |
| microsoft | office_2024 | all versions |
| microsoft | office_2024 | all versions |
| microsoft | word | 2016 |
| microsoft | word | 2016 |
Check a specific version with /api/v1/cve/match.
References
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-78509