CVE-2026-21258

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-20CWE-125

Affected software

No affected versions have been published.

Timeline

Published
Feb 10, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-21258: Medium severity, CVSS 5.5 | Vulnix