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CVE Record

CVE-2016-4291: When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This vulnerability affects Hancom Office 2014 HShow when opening Hangul HShow .hpt documents. A malformed document can trigger memory corruption and may allow code execution as the user running the application. The source bundle does not show CVSS scoring, a confirmed patch, or active exploitation. Exposure is most likely where legacy Hancom Office 2014 HShow is installed and users can open .hpt files from email, downloads, or shared storage. The sources identify one specific trial build and DLL version; broader version impact is not established in the provided evidence. Prioritize discovery and containment if Hancom Office 2014 remains in use, especially in teams receiving external documents. Business urgency is high for exposed legacy desktops, but organization-wide priority depends on confirmed presence of affected HShow builds. Mitigation focus: Check Hancom and Talos guidance for patched builds or retirement recommendations.; Inventory and remove or replace affected Hancom Office 2014 HShow installations.; Restrict opening .hpt files from untrusted or external sources..

Prepared

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Potential ATT&CK relevance

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CVE-2016-4291 mapping review

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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

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
1Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
HancomHancom Office2014 VP Trial HShow.exe Product version: 9.1.0.2176 HncBM90.dll Product version: 9.1.0.2291Listed
Weakness

CWE details

No CWE listed

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