{"id":"CVE-2026-108439","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-108439","generatedAt":"2026-10-27T23:56:57.554Z","title":"Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","description":"Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","published":"2026-10-15T21:17:09.000Z","lastModified":"2026-10-20T12:27:10.000Z","status":"Analyzed","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-122"],"affected":["microsoft/365 apps","microsoft/microsoft 365","microsoft/office 2021","microsoft/office 2024"],"epss":{"score":0.00618,"percentile":0.49323,"date":"2026-10-26","history":[{"date":"2026-10-16","score":0.00442,"percentile":0.36898}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T21:17:09.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-10-15T21:17:09.377Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108439","tags":["Vendor Advisory"],"source":"secure@microsoft.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-108439","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}