{"id":"CVE-2016-4296","aliases":["EUVD-2016-5296","GHSA-27v3-wp78-r8ww"],"status":"published","title":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat...","description":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat object, Hancom Office 2014 will search for an underscore (\"_\") character at the end of the string and write a null terminator after it. If the character is at the very end of the string, the application will mistakenly write the null-byte outside the bounds of its destination. This can result in heap corruption that can lead code execution under the context of the application","severity":{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02224,"percentile":0.82825,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2017-01-06T21:00:00Z","modified":"2026-06-17T00:47:18Z","products":[{"vendor":"hancom","product":"hancom office"},{"vendor":"hancom","product":"hancom_office_2014"}],"references":[{"url":"http://www.talosintelligence.com/reports/TALOS-2016-0151/","tags":["x_refsource_MISC","x_transferred","Exploit","Technical Description","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/92327","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4296"},{"url":"http://www.talosintelligence.com/reports/TALOS-2016-0151"},{"url":"https://github.com/advisories/GHSA-27v3-wp78-r8ww"}],"sources":{"cve":[{"id":"CVE-2016-4296","description":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat object, Hancom Office 2014 will search for an underscore (\"_\") character at the end of the string and write a null terminator after it. If the character is at the very end of the string, the application will mistakenly write the null-byte outside the bounds of its destination. This can result in heap corruption that can lead code execution under the context of the application","status":"published","published":"2017-01-06T21:00:00Z","modified":"2024-08-06T00:25:14.459Z","updated_at":"2026-11-02T14:33:35.149563Z"}],"euvd":[{"id":"EUVD-2016-5296","description":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat object, Hancom Office 2014 will search for an underscore (\"_\") character at the end of the string and write a null terminator after it. If the character is at the very end of the string, the application will mistakenly write the null-byte outside the bounds of its destination. This can result in heap corruption that can lead code execution under the context of the application","status":"published","published":"2017-01-06T21:00:00Z","modified":"2024-08-06T00:25:14Z","updated_at":"2026-11-03T02:22:47.294859Z"}],"ghsa":[{"id":"GHSA-27v3-wp78-r8ww","title":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat...","description":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat object, Hancom Office 2014 will search for an underscore (\"_\") character at the end of the string and write a null terminator after it. If the character is at the very end of the string, the application will mistakenly write the null-byte outside the bounds of its destination. This can result in heap corruption that can lead code execution under the context of the application","status":"published","published":"2022-05-17T03:05:16Z","modified":"2025-04-20T03:31:53Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:01:38.976438Z"}],"nvd":[{"id":"CVE-2016-4296","description":"When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat object, Hancom Office 2014 will search for an underscore (\"_\") character at the end of the string and write a null terminator after it. If the character is at the very end of the string, the application will mistakenly write the null-byte outside the bounds of its destination. This can result in heap corruption that can lead code execution under the context of the application","status":"published","published":"2017-01-06T21:59:01.337Z","modified":"2026-06-17T00:47:18.423Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:03:33.686843Z"}]}}