What is CVE-2019-16338?

CVE-2019-16338 is a high-severity vulnerability in Hancom Office Neo, classified under Use After Free. CVSS score: 7.8/10. Published 2020-03-19.

How severe is CVE-2019-16338?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Hancom Office Neo

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.

Vulnerability class: Use-After-Free

Published 2020-03-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Hancom Office Neo — versions 9.6.1.7634

Weakness classification (CWE)

CWE-416 — Use After Free

References

help.hancom.com/update_en_multilang/details/HOfficeNEO_update.htm (Release Notes, Vendor Advisory)
starlabs.sg/advisories/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16338?: CVE-2019-16338 is a high-severity vulnerability in Hancom Office Neo, classified under Use After Free. CVSS score: 7.8/10. Published 2020-03-19.
How severe is CVE-2019-16338?: High severity. CVSS v3 base score is 7.8 out of 10.