CVE-2026-21258CWE-125CWE-20
Microsoft Excel Information Disclosure Vulnerability
Medium · published February 10, 2026
What it is
Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
The record
Technical detail
- CVSS v3.1
- 5.5 · MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- CVSS v4.0
- Not supplied
- EPSS
- 0.00637 · 49.9th percentile
- Weaknesses
- CWE-125 · Out-of-bounds Read; CWE-20 · Improper Input Validation
- Published
- 2026-02-10T17:51Z
EPSS history
Timeline