Hancom vulnerabilities
We track 7 vulnerabilities in Hancom products across 10 products. 7 are rated high or critical, and none are known to be exploited. The most recent was published on February 4, 2026.
Latest Hancom vulnerabilities
- 8.5 High severity
Hancom Office 2018: Access of Resource Using Incompatible Type
Access of Resource Using Incompatible Type ('Type Confusion') vulnerability in Hancom Inc. Hancom Office 2018, Hancom Inc. Hancom Office 2020, Hancom Inc. Hancom Office 2022, Hancom Inc. Hancom Office 2024 allows File Content Injection.This issue affects Hanco
- 8.8 High severity
Office: Use After Free
Hancom Office Word DOC File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hancom Office Word. User interaction is required to exploit this vulnerabi
- 7.8 High severity
Office: Out-of-bounds Write
Hancom Office Show PPT File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hancom Office Show. User interaction is required to exploit t
- 7.8 High severity
Office: Out-of-bounds Write
Hancom Office Cell XLS File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hancom Office Cell. User interaction is required to exploit t
- 8.8 High severity
HCell: Buffer Copy without Checking Size of Input
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Hancom HCell on Windows allows Overflow Buffers.This issue affects HCell: 12.0.0.893.
- 7.8 High severity
Hancom Office 2020: Use After Free
A use-after-free vulnerability exists in the footerr functionality of Hancom Office 2020 HWord 11.0.0.7520. A specially crafted .doc file can lead to a use-after-free. An attacker can trick a user into opening a malformed file to trigger this vulnerability.
- 7.8 High severity
Hancom Office 2020: Buffer Underwrite
A buffer underflow vulnerability exists in the way Hword of Hancom Office 2020 version 11.0.0.5357 parses XML-based office files. A specially-crafted malformed file can cause memory corruption by using memory before buffer start, which can lead to code executi