CVE-2026-21258

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

CVE-2026-21258

CVE-2026-21258 is an Excel-related vulnerability described as improper input validation that could allow a local attacker to disclose information. The metric indicates a medium-severity CVSS v3.1 base score of 5.5 (LOCAL, low attack complexity, no privileges required, user interaction required) w...