How severe is CVE-2019-16338?

CVE-2019-16338 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-2019-16338 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-16338?

CVE-2019-16338 affects Hancom Hancom Office Neo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-16338?

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-2019-16338 published?

CVE-2019-16338 was published on 2020-03-19 and last updated on 2026-06-17.

CVE-2019-16338

CVE-2019-16338 is a high-severity vulnerability in Hancom Hancom Office Neo 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-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Hancom Hancom Office Neo
Published: 2020-03-19
Last modified: 2026-06-17

Description

The tfo_common component in HwordApp.dll in Hancom Office 9.6.1.7634 allows a use-after-free via a crafted .docx file.

Frequently asked questions

What is CVE-2019-16338?: The tfo_common component in HwordApp.dll in Hancom Office 9.6.1.7634 allows a use-after-free via a crafted .docx file.
How severe is CVE-2019-16338?: CVE-2019-16338 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-2019-16338 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-16338?: CVE-2019-16338 affects Hancom Hancom Office Neo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-16338?: 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-2019-16338 published?: CVE-2019-16338 was published on 2020-03-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hancom:hancom_office_neo:9.6.1.7634:*:*:*:*:*:*:*

More vulnerabilities in Hancom Hancom Office Neo

CVE-2019-16337 — High (CVSS 7.8): The hncbd90 component in Hancom Office 9.6.1.9403 allows a use-after-free via an unknown object in a crafted .docx file.
CVE-2018-5201 — Medium (CVSS 5.5): Hancom Office 2018 10.0.0.8214 and earlier, Hancom Office NEO 9.6.1.10472 and earlier, Hancom Office 2014 9.1.1.4540…

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