What’s Vulnerable › Vulnerabilities

CVE-2016-4295

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-01-06 · updated 2026-06-17
• Weakness: CWE-119

Description

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.

Affected products

• Hancom Office: through 9.1.0.2176

References

• http://www.securityfocus.com/bid/92327
• http://www.talosintelligence.com/reports/TALOS-2016-0150/
• http://www.securityfocus.com/bid/92327
• http://www.talosintelligence.com/reports/TALOS-2016-0150/

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