{"id":"CVE-2026-21509","vendor_project":"Microsoft","product":"Office","vulnerability_name":"Microsoft Office Security Feature Bypass Vulnerability","date_added":"2026-01-26","due_date":"2026-02-16","known_ransomware_use":"Unknown","short_description":"Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature locally. Some of the impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","cwes":"CWE-807","cvss_version":"3.1","cvss_severity":"HIGH","cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","nvd_published":"2026-01-26","nvd_status":"Analyzed","epss":0.72872,"epss_percentile":0.99427,"cvss_score":7.8,"days_published_to_kev":0,"source":"https://data.cybermax-tools.workers.dev/cve/CVE-2026-21509","by":"CyberMax"}