CVE catalog
CVE-2026-42831
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
- Severity
- High · CVSS 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.44% · Oct 25, 2026
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | 365_copilot | Not reported | 16.0.19822.20190 | fixed |
| Cpe | office | Not reported | Not reported | unknown |
| Cpe | office_long_term_servicing_channel | Not reported | Not reported | unknown |
| Cpe | 365_copilot | Not reported | 16.0.19822.20190 | fixed |
| Cpe | office | Not reported | Not reported | unknown |
| Cpe | office_long_term_servicing_channel | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | 365_copilot | cpe | Not reported | 16.0.19822.20190 | Not reported | Not reported | Not reported |
| Cpe | 365_copilot | cpe | Not reported | 16.0.19822.20190 | Not reported | NVD-CVE-2026-42831 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: