CVE-2026-78510
Microsoft Outlook and Word Remote Code Execution Vulnerability
At a glance
- Severity
- HIGH 8.4
- EPSS
- EPSS 0.37 % · percentile 31 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Modified
Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Scores
| Version | Score | Vector | Scored by |
|---|
| CVSS 3.1 | HIGH 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | HIGH 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · secure@microsoft.com (Primary) |
Weaknesses (CWE)
European references
CERT-FR advisories
Affected configurations (NVD CPE)
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:*cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:*cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
Affected products
References
Sources
