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CVE Record

CVE-2016-4295: When opening a Hangul Hcell Document (.cell) and processing a particular record within the Workbook stream,...

When opening a Hangul Hcell Document (.cell) and processing a particular record within the Workbook stream, an index miscalculation leading to a heap overlow can be made to occur in Hancom Office 2014. The vulnerability occurs when processing data for a formula used to render a chart via the HncChartPlugin.hplg library. Due to a lack of bounds-checking when incrementing an index that is used for writing into a buffer for formulae, the application can be made to write pointer data outside its bounds which can lead to code execution under the context of the application.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2016-4295 is a file-opening vulnerability in Hancom Office 2014 HCell. A malicious .cell spreadsheet can trigger memory corruption while chart formula data is processed, potentially allowing code to run as the user who opened the document. Exposure is most likely where Hancom Office 2014 VP Trial HCell components version 9.1.0.2176 are installed and users can open untrusted .cell files. The source bundle does not name other affected versions or products. Treat this as a high-priority legacy software exposure if Hancom Office 2014 is present. The business risk is user-driven code execution from malicious documents, but urgency depends on actual deployment and document intake paths. Mitigation focus: Check Hancom and Talos guidance for fixed versions or vendor remediation.; Inventory endpoints for the named Hancom Office 2014 HCell build.; Restrict opening untrusted .cell files from email, web, and external sources..

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

CVSS and timeline data

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
HancomHancom Office2014 VP Trial HCell.exe Product version: 9.1.0.2176, HCellApp.dll Product version: 9.1.0.2176 HCellBook.dll Product version: 9.1.0.2176Listed
Weakness

CWE details

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