CVE-2025-29867 Memory corruption in Hancom Office 2018
A type confusion vulnerability in Hancom Office allows attackers to inject file content, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-29867?
CVE-2025-29867 is a high-severity memory corruption vulnerability in Hancom Office 2018, published on 4 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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 Hancom Office 2018: before 10.0.0.12681; Hancom Office 2020: before 11.0.0.8916; Hancom Office 2022: before 12.0.0.4426; Hancom Office 2024: before 13.0.0.3050.
Weakness: CWE-843
Which versions are affected by CVE-2025-29867?
How do I fix CVE-2025-29867?
No fix has been published for CVE-2025-29867 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-29867 being exploited?
There is no known exploitation of CVE-2025-29867 in the wild and no public exploit code.
Sources
Also known as GHSA-rf85-m599-59pj.