CVE-2019-16338

Name: CVE-2019-16338
Creator: NVD / NIST
Published: 2020-03-19T18:15:14.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.03%

Last modified Jun 17, 2026

CVE-2019-16338 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The tfo_common component in HwordApp.dll in Hancom Office 9.6.1.7634 allows a use-after-free via a crafted .docx file.. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.03%

59.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Hancom	Hancom Office Neo	9.6.1.7634

References

http://help.hancom.com/update_en_multilang/details/HOfficeNEO_update.htmRelease Notes, Vendor Advisory
https://starlabs.sg/advisories/Exploit, Third Party Advisory
http://help.hancom.com/update_en_multilang/details/HOfficeNEO_update.htmRelease Notes, Vendor Advisory
https://starlabs.sg/advisories/Exploit, Third Party Advisory

Timeline

Published: Mar 19, 2020
Last Modified: Jun 17, 2026
Status: Modified

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 score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16338?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16338?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST