CVE-2017-2819: Hancom Hangul Word Processor

High severity, CVSS 7.8. EPSS: 1.7% chance of exploitation in the next 30 days.

An exploitable heap-based buffer overflow exists in the Hangul Word Processor component (version 9.6.1.4350) of Hancom Thinkfree Office NEO 9.6.1.4902. A specially crafted document stream can cause an integer underflow resulting in a buffer overflow which can lead to code execution under the context of the application. An attacker can entice a user to open up a document in order to trigger this vulnerability.

Affected products

• Hancom Hangul Word Processor: version 9.6.1.4350 only
• Hancom Thinkfree Office Neo: version 9.6.1.4902 only

Published 2017-05-24. Last modified 2026-06-17.