{"id":"CVE-2017-2789","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-2789","generatedAt":"2026-10-28T19:03:53.226Z","title":"This value is larger than the buffer size, which leads to a heap-based buffer overflow.","description":"When copying filedata into a buffer, JustSystems Ichitaro Office 2016 Trial will calculate two values to determine how much data to copy from the document. If both of these values are larger than the size of the buffer, the application will choose the smaller of the two and trust it to copy data from the file. This value is larger than the buffer size, which leads to a heap-based buffer overflow. This overflow corrupts an offset in the heap used in pointer arithmetic for writing data and can lead to code execution under the context of the application.","published":"2017-02-24T22:59:00.000Z","lastModified":"2026-06-17T01:16:52.000Z","status":"Modified","sourceIdentifier":"talos-cna@cisco.com","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-119"],"affected":["justsystems/ichitaro"],"epss":{"score":0.0234,"percentile":0.83527,"date":"2026-10-27","history":[]},"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 (2.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/96438","source":"talos-cna@cisco.com"},{"url":"http://www.talosintelligence.com/reports/TALOS-2016-0196/","source":"talos-cna@cisco.com"},{"url":"http://www.securityfocus.com/bid/96438","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.talosintelligence.com/reports/TALOS-2016-0196/","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-2789","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."}