CVE-2016-4294
CVE-2016-4294 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-119.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Hancom Hancom Office 2014
- Published:
- Last modified:
Description
When opening a Hangul Hcell Document (.cell) and processing a property record within the Workbook stream, Hancom Office 2014 will attempt to allocate space for an element using a length from the file. When copying user-supplied data to this buffer, however, the application will use a different size which leads to a heap-based buffer overflow. This vulnerability can lead to code-execution under the context of the application.
Frequently asked questions
- What is CVE-2016-4294?
- When opening a Hangul Hcell Document (.cell) and processing a property record within the Workbook stream, Hancom Office 2014 will attempt to allocate space for an element using a length from the file. When copying user-supplied data to this buffer, however, the application will use a different size which leads to a heap-based buffer overflow. This vulnerability can lead to code-execution under the context of the application.
- How severe is CVE-2016-4294?
- CVE-2016-4294 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-2016-4294 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2016-4294?
- CVE-2016-4294 affects Hancom Hancom Office 2014. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2016-4294?
- 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-2016-4294 published?
- CVE-2016-4294 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…
- CVE-2016-4298 — High (CVSS 7.8): When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will…
- CVE-2016-4296 — High (CVSS 7.8): When opening a Hangul Hcell Document (.cell) and processing a record that uses the CSSValFormat object, Hancom Office…
- CVE-2016-4295 — High (CVSS 7.8): When opening a Hangul Hcell Document (.cell) and processing a particular record within the Workbook stream, an index…
- 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…
- CVE-2016-4291 — High (CVSS 7.8): When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will use…
All CVEs affecting Hancom Hancom Office 2014 →
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