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TI-2016-03685 Aliases CVE-2016-4296GHSA-27v3-wp78-r8ww

Memory corruption in Hancom Office

Priority LOW 38CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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

Why it matters now

EPSS 0.02224 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
HancomHancom Office2014 VP Trial HCell.exe Product version: 9.1.0.2176, HCellApp.dll Product version: 9.1.0.2176 HCellBook.dll Product version: 9.1.0.2176—No fix listedCNA
  • Hancom Office VendorHancom Affected 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 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:hancom:hancom_office_2014:*:*:*:*:*:*:*:*up to 9.1.0.2176VulnerableHancom
  • cpe:2.3:a:hancom:hancom_office_2014:*:*:*:*:*:*:*:* Versions up to 9.1.0.2176 Vulnerable ·Hancom

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-4296
  2. 2026-10-03 Alias added: GHSA-27v3-wp78-r8ww

References

Exploit 1

  • TI-2016-03682 Multiple heap-based buffer overflows in the (1) CBookBase::SetDefTableStyle and (2)… CVSS 3.0HIGH 7.8
  • TI-2016-03686 Integer overflow in Hancom version Hancom Office 2014 VP Trial HShow.exe Product version… CVSS 3.0HIGH 7.8
  • TI-2016-03683 Memory corruption in Hancom Office CVSS 3.0HIGH 7.8
  • TI-2016-03684 Memory corruption in Hancom Office CVSS 3.0HIGH 7.8
  • TI-2016-03681 Memory corruption in Hancom Office CVSS 3.0HIGH 7.8
  • TI-2016-03680 Integer overflow in Hancom Office CVSS 3.0HIGH 7.8
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences