How severe is CVE-2016-4291?

CVE-2016-4291 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4291 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4291?

CVE-2016-4291 affects Hancom Hancom Office 2014. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4291?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-4291 published?

CVE-2016-4291 was published on 2017-01-06 and last updated on 2026-06-17.

CVE-2016-4291

CVE-2016-4291 is a high-severity vulnerability in Hancom Hancom Office 2014 with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Hancom Hancom Office 2014
Published: 2017-01-06
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2016-4291?: 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.
How severe is CVE-2016-4291?: CVE-2016-4291 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-4291 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4291?: CVE-2016-4291 affects Hancom Hancom Office 2014. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4291?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-4291 published?: CVE-2016-4291 was published on 2017-01-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hancom:hancom_office_2014:*:*:*:*:*:*:*:*

More vulnerabilities in Hancom Hancom Office 2014

CVE-2016-4293 — High (CVSS 7.8): Multiple heap-based buffer overflows in the (1) CBookBase::SetDefTableStyle and (2) CBookBase::SetDefPivotStyle…
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CVE-2016-4292 — High (CVSS 7.8): When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will use…

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