{"id":"CVE-2026-81401","title":"Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","summary":"Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-843"],"vendor":"microsoft","product":"365_apps","affected":["365_apps","excel = 2016","microsoft_365","office_2016","office_2019","office_2021","office_2024","office_online_server < 16.0.10417.20207"],"patched":["office_online_server 16.0.10417.20207"],"published":"2026-09-08","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:18:39.953","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81401","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81401","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T19:41:34.086771Z"},"epss":0.00498,"epssPercentile":0.41597,"ingestedAt":"2026-09-08T19:08:49.632Z","slug":"CVE-2026-81401","body":"## Overview\n\nAccess of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.\n\n## Affected\n\n- `365_apps`\n- `excel = 2016`\n- `microsoft_365`\n- `office_2016`\n- `office_2019`\n- `office_2021`\n- `office_2024`\n- `office_online_server < 16.0.10417.20207`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `office_online_server 16.0.10417.20207`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}