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TI-2016-03680 Aliases CVE-2016-4291GHSA-crxv-hwq9-wj7h

Integer overflow in Hancom Office

Priority LOW 38CWE-190Published · 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-190 and the CVSS impact.

Summary

When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will use a field from the structure in an operation that can cause the integer to overflow. This result is then used to allocate memory to copy file data in. Due to the lack of bounds checking on the integer, the allocated memory buffer can be made to be undersized at which point the reading of file data will write outside the bounds of the buffer. This can lead to code execution under the context of the application.

Why it matters now

EPSS 0.02125 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 HShow.exe Product version: 9.1.0.2176 HncBM90.dll Product version: 9.1.0.2291—No fix listedCNA
  • Hancom Office VendorHancom Affected 2014 VP Trial HShow.exe Product version: 9.1.0.2176 HncBM90.dll Product version: 9.1.0.2291 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-2016-4291
  2. 2026-10-03 Alias added: GHSA-crxv-hwq9-wj7h

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-2016-03685 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
See all 8 →

Sources

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