CVE-2023-51598

Arbitrary code execution via invalid DOC object access

Published May 3, 2024 · Updated Aug 2, 2024

Use-after-free in Hancom Office Word 11.0.0.6914 allows remote attackers to execute arbitrary code through a crafted DOC file. The DOC parser fails to validate that an object still exists before performing operations on it, causing access to released memory. The target must visit a malicious page or open the file, after which code runs in the context of the current process.

CVSS severity7.0
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Hancom Office Word 11.0.0.6914 allows remote attackers to execute arbitrary code through a crafted DOC file. The DOC parser fails to validate that an object still exists before performing operations on it, causing access to released memory. The target must visit a malicious page or open the file, after which code runs in the context of the current process.

The record

CVE
CVE-2023-51598
Published
May 3, 2024
Updated
Aug 2, 2024
Vendor
Hancom Inc.
Product
Hancom Office
Classifications
CWE-416, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.0.0.6914
  2. Affected versionversion=HancomOffice Word 11.0.0.6914

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Hancom Inc. · Hancom Officeversion=11.0.0.6914; version=HancomOffice Word 11.0.0.6914

Published CVSS scores

7.0Zero Day InitiativeCVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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