CVE-2026-78506
Low
No strong exploitation signal.
CVSS base
5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS — probability of exploitation (30 days)
0.5%
44.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-170
Published 2026-09-08 · modified 2026-09-17
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | N | None |
| Availability | N | None |
Timeline
- 2026-09-08 — Published (NVD)
- 2026-09-17 — Last modified (NVD)
Description
Improper null termination in Microsoft Office Word allows an unauthorized attacker to disclose information locally.