{"id":"CVE-2026-78512","aliases":[],"cve":{"records":[{"id":"CVE-2026-78512","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-24T17:28:00.622Z","published":"2026-09-08T17:18:33.310Z","modified":"2026-10-30T21:56:50.736Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-30T21:56:50.736Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-09-09T09:54:50.352Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78512","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-197","description":"CWE-197: Numeric Truncation Error","source":"microsoft"},{"id":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*","versionStartIncluding":"19.0.0","versionEndExcluding":"16.0.10417.20207"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*","versionStartIncluding":"16.0.1","versionEndExcluding":"16.0.20326.20138"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*","versionStartIncluding":"16.0.1","versionEndExcluding":"16.113.26091433"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*","versionStartIncluding":"16.0.1","versionEndExcluding":"16.0.14334.20906"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.17932.20976"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.113.26091433"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_2016:*:*:*:*:*:*:x86:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.5569.1002"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*","versionStartIncluding":"1.0.0","versionEndExcluding":"16.113.26091433"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-09-09T04:22:37.096728Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Microsoft Office Word Remote Code Execution Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","score":8.8,"severity":"high","published":"2026-09-08T17:18:33.310Z","modified":"2026-10-30T21:56:50.736Z","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-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office 2016","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.5569.1002","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office 2019","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"19.0.0","status":"affected","lessThan":"16.0.10417.20207","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office 365 for Mac","platforms":[],"versions":[{"version":"1.0.0","status":"affected","lessThan":"16.113.26091433","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office LTSC 2021","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.1","status":"affected","lessThan":"16.0.14334.20906","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office LTSC 2024","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.17932.20976","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office LTSC for Mac 2021","platforms":[],"versions":[{"version":"16.0.1","status":"affected","lessThan":"16.113.26091433","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"},{"vendor":"Microsoft","name":"Microsoft Office LTSC for Mac 2024","platforms":[],"versions":[{"version":"16.0.0","status":"affected","lessThan":"16.113.26091433","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78512"],"sources":[{"name":"CVE","id":"CVE-2026-78512","modified":"2026-10-30T21:56:50.736Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","score":8.8}],"sourceAffected":[],"observedAt":"2026-10-30T22:46:34.719Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T16:30:35.111Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-31T03:40:31.395Z","attemptedAt":"2026-10-31T03:40:31.395Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-31T03:40:30.965Z","attemptedAt":"2026-10-31T03:40:30.965Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-31T03:40:31.395Z","attemptedAt":"2026-10-31T03:40:31.395Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-31T03:40:31.395Z","attemptedAt":"2026-10-31T03:40:31.395Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-wmm4-h5xq-67rx","url":"https://github.com/advisories/GHSA-wmm4-h5xq-67rx","modified":"2026-09-08T18:33:51Z","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","checkedAt":"2026-10-31T03:40:30.965Z"},{"source":"FIRST EPSS","id":"CVE-2026-78512","url":"https://www.first.org/epss/","probability":0.00819,"percentile":0.57173,"date":"2026-10-30","checkedAt":"2026-10-31T03:40:31.395Z"},{"source":"ENISA EUVD","id":"EUVD-2026-73818","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-73818","modified":"Oct 30, 2026, 9:56:50 PM","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","checkedAt":"2026-10-31T03:40:31.395Z"},{"source":"NVD","id":"CVE-2026-78512","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78512","modified":"2026-09-24T18:18:50.147","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","checkedAt":"2026-10-31T03:40:31.395Z"}],"aiSummary":{"text":"A numeric truncation error in Microsoft Office Word may allow an attacker to execute code. Affected versions include Microsoft 365 Apps for Enterprise, Microsoft Office 2016, and others.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T00:56:07.515Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-78512"}]}}