CVE-2026-81396
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.4%
35.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-121
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:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-09-08 — Published (NVD)
- 2026-09-17 — Last modified (NVD)
Description
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.