CVE-2016-4296

HighCVSS 7.8/10Last modified Jun 17, 2026

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

Metrics

CVSS 3.0 7.8/10CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-119

Affected software

Vendor	Product	Versions
Hancom	Hancom Office	2014 VP Trial HCell.exe Product version: 9.1.0.2176, HCellApp.dll Product version: 9.1.0.2176 HCellBook.dll Product version: 9.1.0.2176

References

http://www.securityfocus.com/bid/92327
http://www.talosintelligence.com/reports/TALOS-2016-0151/Exploit, Technical Description, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/92327
http://www.talosintelligence.com/reports/TALOS-2016-0151/Exploit, Technical Description, Third Party Advisory, VDB Entry

Timeline

Published: Jan 6, 2017
Last modified: Jun 17, 2026
NVD status: Modified

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