{"id":"CVE-2026-81396","aliases":[],"cve":{"records":[{"id":"CVE-2026-81396","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-26T18:46:26.215Z","published":"2026-09-08T17:18:58.377Z","modified":"2026-10-30T21:57:13.582Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-30T21:57:13.582Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-09-09T09:54:47.491Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81396","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","source":"microsoft"},{"id":"CWE-193","description":"CWE-193: Off-by-one 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Coordinator","timestamp":"2026-09-09T04:19:45.854551Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Microsoft Excel Remote Code Execution Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","score":7.8,"severity":"high","published":"2026-09-08T17:18:58.377Z","modified":"2026-10-30T21:57:13.582Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":"Microsoft 365 Apps for Enterprise","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.1","status":"affected","lessThan":"16.0.20326.20138","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-81396"},{"vendor":"Microsoft","name":"Microsoft Excel 2016","platforms":["32-bit 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2021","platforms":[],"versions":[{"version":"16.0.1","status":"affected","lessThan":"16.112.26083020","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-81396"},{"vendor":"Microsoft","name":"Microsoft Office LTSC for Mac 2024","platforms":[],"versions":[{"version":"16.0.0","status":"affected","lessThan":"16.112.26083020","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-81396"},{"vendor":"Microsoft","name":"Office Online 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EUVD","id":"EUVD-2026-73863","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-73863","modified":"Oct 30, 2026, 9:57:13 PM","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","checkedAt":"2026-10-31T01:20:30.705Z"},{"source":"GitHub Advisory Database","id":"GHSA-57f5-cgpg-3p8c","url":"https://github.com/advisories/GHSA-57f5-cgpg-3p8c","modified":"2026-09-08T18:33:56Z","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","checkedAt":"2026-10-31T01:20:30.937Z"},{"source":"FIRST EPSS","id":"CVE-2026-81396","url":"https://www.first.org/epss/","probability":0.00466,"percentile":0.4042,"date":"2026-10-30","checkedAt":"2026-10-31T01:20:30.939Z"}],"aiSummary":{"text":"A stack-based buffer overflow in Microsoft Excel allows an attacker to execute code locally. The vulnerability affects various Microsoft Office products, including Microsoft 365 Apps for Enterprise and Microsoft Excel 2016.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T00:41:05.973Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-81396"}]}}