CyberSecBulletin
CVE-2025-29867NVD status: Deferred

Hancom Office 2018: Access of Resource Using Incompatible Type

Published Updated By the CyberSecBulletin desk

CVE-2025-29867 is a high-severity access of resource using incompatible type vulnerability in Hancom Office 2018 from Hancom, with a CVSS 4.0 base score of 8.5 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists version 10.0.0.12681 as the first without the flaw, so updating Hancom Office 2018 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.27% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Hancom Office 2018 to 10.0.0.12681 or a later version.
  2. Update Hancom Office 2020 to 11.0.0.8916 or a later version.
  3. Update Hancom Office 2022 to 12.0.0.4426 or a later version.
  4. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
HancomHancom Office 2018before 10.0.0.1268110.0.0.12681
HancomHancom Office 2020before 11.0.0.891611.0.0.8916
HancomHancom Office 2022before 12.0.0.442612.0.0.4426
HancomHancom Office 2024before 13.0.0.305013.0.0.3050

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Attack requirements
NoneThe attack does not depend on a particular deployment or configuration.
Privileges required
NoneNo account or login is needed.
User interaction
PassiveA user only needs to do something routine, such as viewing a page.
Confidentiality (vulnerable system)
HighSerious loss of confidentiality on the vulnerable system.
Integrity (vulnerable system)
HighSerious loss of integrity on the vulnerable system.
Availability (vulnerable system)
HighSerious loss of availability on the vulnerable system.
Confidentiality (other systems)
NoneNo loss of confidentiality on systems beyond the vulnerable one.
Integrity (other systems)
NoneNo loss of integrity on systems beyond the vulnerable one.
Availability (other systems)
NoneNo loss of availability on systems beyond the vulnerable one.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA (krcert.or.kr).

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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Access of Resource Using Incompatible Type

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Access of Resource Using Incompatible Type vulnerabilities

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